Vortec 454 High Idle

I have changed to a new aluminum 3 row rad, 160 stat, then changed to a 160 high flow stat, dual e fans, new water pump, new hoses, flushed the system 3 times, disconnected egr, then re connected it. The stock MAP sensor used on all non-supercharged and non-turbocharged engines is what as known as a 1-bar MAP sensor. 4 (454) but just checking out injection as I thought there was either a spider of fuel delivery injection instead of individual injectors to test like with a noid light?. I'm getting a high idle on the Vortec 350 in my Cruiser. It was an eight-cylinder engine with a multi-port fuel injector, and each cylinder had two valves that were operated by hydraulic roller cams. Slide or tap the high idle stop to the right until it is against the engine control lever. all of the fallowing have been replaced trying to fix it. Joined: 30 Apr 1999 Posts: 10762 Location: 2015 Tahoe 2WD 5. I've replaced iacv maf tps map and all intake gaskets. 95-mm bore and a 101. gm454 engines do not do well if left idling for very long, because with the formulation of modern oils, it can cause extreme cam wear. High Energy™ 206/206 Hydraulic Flat Cam for Chevrolet Big Block 396-454. Type: High Flow Throttle Body. runs rough until its warm. 50 or numerically-higher rear gears. If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine. Read Part 2 of Head Games as we install cylinder heads and Comp Cams' Gen V hydraulic roller cam on a 1996 Chevy Dually Truck only on sporttruck. vortec high idle. has misfire on #5 cylinder,and iac faulty. Past Rigs: 2000 Chevy 2500 Reg Cab 454 3. of filtered fuel at the ftiel rail and maintain that pressure from idle to high speed wide open throttle. The engine is a 99 Vortec 454 in a K2500. Long story short, I needed to swap the V6 in the truck for another engine (it had a rod knock). I think I read somewhere that 40-80 was the correct operating range, but want to make sure. Torque the high RPM stop bracket screw to 70 in. Master Engine Rebuild Kit FITS: 1999-2000 Chevrolet GMC 454 7. Here's one of the big blocks I built. Tighten the cable clamp screw. I think compression will be ok with a. The engine starts & runs at idle for a couple of minutes, then when I press the accelerator pedal once, the. Also known as the Vortec 7400 (7. The following trouble-shooting instructions apply to the AC-type […]. com, the official website of Sport Truck Magazine. 50:1 gears with a Richmond 6 speed that will get me 141 mph in 4th and 172 in 5th (at 5900), but I want to. Any ideas? - Any help is appreciated. fuel filter, plugs, wires, cap, rotor, coil, pcv, egr, complete intake manifold assembly off a crate motor that had 0 miles including throttle body, tps, egr, fuel rail, injectors, regulator. Cams may not be computer compatible with EFI Engines. The engine is a 99 Vortec 454 in a K2500. Look for a high engine idle. Access our free Throttle Body Injection (TBI) Repair Guide for Chevrolet Full Size Cars 1979-1989 through AutoZone Rewards. 4L (454) V-8 gas Rail Chassis 1995 PI-1005 May require the use of "Park/Neutral/Reverse" switch PI-203. valves, but the heads are in the machine shop now so all will be well in a week or so. The ZZ454/440 is delivered as a complete assembly including water pump, balancer, water intake manifold, and 14" automatic transmission flexplate. Banks Products for 1996-00 GM 7. Open 24x7 - Same Day Shipping! Save $10 off $399, $15 off $599, $25 off $799, $100 off $1,699 Orders. Mitsui (MES) has ordered 3 × SCR-HP (cluster 3) units in connection with the building of three 87…. When the cars idle gets rough, it hard to comprehend the related causes. heres the deal 98 chevy 3/4 ton 4x4 454 vortec,170000 miles. There were 3 different variations of the 454 that came onto the drawing board at GM during the 70s; the LS5, the LS6, and the LS7 which. High output aside, don't expect your alternator to do anything for you at idle speeds. Help truck has high idle!!! Nov 25 2012, 10:52pm Cleaned the throttle body and went to put it back on and start it with out the intake attached to the throttle body. My LTFTs at idle go up too when idling a while. Hey Gang, I just purchased a 1995 S10 Blazer with the Vortec 4. runs rough until its warm. Seems cruising down the road at about 2000 rpms it reads 38 to 40 psi. 454 CID / 7. Type: High Flow Throttle Body. Car and Truck Repair Parts Menu. The truck idles about 750-850 rpm`s in drive. I got it running very poorly back fireing thrugh the exsaust lightly (poping), etc. GoNDown, did you recently disconnect your battery? After I left mine dead in the yard for a while and didn't charge it, when I started it up it ran like you describe for a few days and then it was fine. Idle speed on the L29 "Vortec 454" is determined by the Powertrain Control Module (PCM) electronically. so far i have taken throttle body off and cleaned,replaced the iac. The Vortec 454 engine had 7,439 cubic centimeters, or 454 cubic inches, of displacement, giving it the 454 or 7400 name. then it dies, If I pump the gas it will choke some bit idle up and die. 0/1 CR, roller cam and broad powerband from idle to 5000, then the 454 Vortec is the way to go. 5 vacuum in park. Move the. Sprayed the intake with starting fluid looking for a vacum leak, no luck either. 3 vortec intake manifold to stop getting updates on your eBay Feed. GoNDown, did you recently disconnect your battery? After I left mine dead in the yard for a while and didn't charge it, when I started it up it ran like you describe for a few days and then it was fine. On a normal operating engine, it is typical to see high IAC counts (100 or more) when the engine is idling cold and during the warm-up cycle. idles at 1,200rpm in park,in drive in runs at900 rpm when. 7L/350ci Vortec Marine engines. The engine struggles to keep it above 7-800 RPM. If I try to push on gas it eventually would backfire and smelled rich. 918 Volts when throttle half open. 0L/305ci & 5. Frequent battery or alternator failures - Overtaxing the capacity of a standard alternator can shorten the life of the battery and alternator itself. Tried a new air idle valve, no luck. It started with the engine light being on for a while, with a slightly rough idle but otherwise ran great. 0 liter engines each consume about the same amount of fuel at idle (0. « Reply #11 on: May 15, 2011, 09:57:58 AM » Guess my question is do I really need the block heater also can you point me in the direction to finding that dang knock wire. Very smooth idle. 3L VORTEC Upper And Lower Intake Manifold - $120. 93 Chevy Pickup High Idle: Sign In I have a 1993 Chevy 1/2ton pickup 2wd with a 5. I will definitely recommend you to others. After running fine last night, and for a good portion of the day, I was on. I have a problem with a 98 Chevy 4x4 5. When the idle is high or low, it could be caused by a malfunction of this system or any of the individual components that comprise the system. Its a real pta when your plowing. Shop 454 Chevy Big Block V8 Intake Manifold/Carburetor Kits and get Free Shipping on orders over $99 at Speedway Motors, the Racing and Rodding Specialists. It will randomly idle high. you should consider a cam swap and upgrading the springs as well. I changed the plugs, wires, fuel filter, and even the. PowerAid 96-00 Chevy / GMC C/K 454 Vortec. Troubleshooting Your Chevy Truck Gas Gauge Failure Replacement Parts: Tank Sending Unit Sending Unit Float (only if not replacing the full unit) Voltage Regulator Most gas tank units consist of two parts, the gas gauge mounted in the dash and a tank sender mounted in the tank. 4L (454) Custom Tuning module. 7 liter 140 000 approx miles Thanks for any advice or assistance. 8 rear with 3. None of the regulators can force a pump past it maximum pressure potential. I will definitely recommend you to others. Very smooth idle. Edelbrock Part # 7162 Performer RPM Camshaft is designed for big-block Chevy 396-427-454 V-8 applications. Cap and rotor were done less than 10,000 miles ago and look good. What Should The Oil Pressure Be On A Big Block 454 Chevrolet And Operating Temperature When Im on the gas the oil pressure stays at around 65-70, when its at idle and the engine is warmed up it drops down and hovers around 40. Then record you idle advance at this point. I got it running very poorly back fireing thrugh the exsaust lightly (poping), etc. 0L BLACK Cold Air : $59. when going slow, like in the driveway, it will miss and seem like its going to die then surge and come right back. 6 L) in displacement. 3L Vortec V6. Unlike the popular Chevy 427 that was used in a wide variety of automobiles, the 454 was used only in high performance cars like the Chevy Camaro, Corvette and Chevelle. idles at 1,200rpm in park,in drive in runs at900 rpm when. 7L Vortec, also the Vortec has just been bored. The dazzling example featured here, chassis GT40P/1074, earns bonus points for at least three reasons. 050 solid cam, very rough idle, low vacuum. valves, but the heads are in the machine shop now so all will be well in a week or so. If you sit at a light for more than a few moments it will start to idle lower and lower until it stalls. The cam needed. Cap and rotor were done less than 10,000 miles ago and look good. Im putting a vortec 454 in my 78 Camaro with a th400 transmission and 3. Perfect for car audio enthusiasts, HID lights, off-roaders, 4X4, snow plow, CB radio, military up armored vehicles, law enforcement vehicles or racing freaks. This is a discussion on Better idle with Mass Airflow Sensor unplugged within the General Help forums, part of the LSx Technical Help Section category; I have been chasing down an idle problem and decided to unplug the MAF to see if it would run. Better idle with Mass Airflow Sensor unplugged. I am having a terrible time with getting it to idle smooth. 4L , 87-90 Edelbrock 2604 Performer Air-Gap Intake 1987-95 SB Chevy w/ TBI Heads See more like. GM TBI Swap. The metal end of the hose that attaches to the condenser at the front grill can be cut and mated to the high pressure compressor line. i tested the plug wires they were good. Not too bad, but noticeably lower than the normal. instant lubrication when you start the truck and it's thick at high operation temps. Misfires happen at any rpm. alot of thirdgen. Each cylinder had a 107. Good low to mid range torque and horsepower. Holley 300-263 Efi Single Plane Intake Fits Sb Chevy V8 With L31 Vortec Heads. As a result the throttle position sensor gave too high an initial reading to the computer for 'idle' and also the throttle plate bing cracked acts like a vaccuum leak and the idle air control valve resets to 0 to try to control the rpm down. This engine is in an 89 suburban using a standalone wiring harness, from Painless. I have replaced all the sensors and the ECM, checked all the wiring and still no fix. Look for the idle air codes /fauts. I wouldn't worry too much about a high volume pump sucking the pan dry, you have a 7 qt. SBC CHEVY VORTEC INTAKE MANIFOLD ALUMINUM# PC-2006Fits engines with V8 GM Vortec heads only. Outlet (60 PSI) Low Pressure Pump is 4-7 PSI at outlet. 4 L spark knock and power. Like I said earlier, standard big block parts won't fit on the Vortec 8100, so the performance parts available for it are close to none. It is high mileage, with 225K miles. The Chevrolet small-block engine is a series of V8 automobile engines used in normal production by the Chevrolet division of General Motors between 1954 and 2003, using the same basic engine block. 467 lift cam has good low mid and high power, it is similar to the L-79 corvette 327 cam, with 9. Surprisingly, the 454 laid down an impressive 330 horsepower and 475 pound-feet of torque. I think my Blazer idles too high even in the summer days. 00 1998-2002 Camaro & TransAm, 1997-2004 Corvette, 2004 GTO 5. Why could cause a 1996 Chevy Cavalier to idle high after fixing a warped head? You probably have a vacuum leak. However, this is one company who offers some very interesting Vortec 8100 parts. Sometimes even into the high teens but once underway and at a steady speed they'll return to zero. Covering fuel delivery, performance and starting in regards to the fuel system operation. I recently got a 98 GMC K2500 with the 454 engine. The 454 died in 2000 to 2001, but the vans dropped it after 2000. 3 angle grinds on both sides, 480HP potential naturally-aspirated, and valve train is rated beyond 7k without. Worse problem is bad hesitation when accelerating after throttle at idle position, sometimes stalling. The old, weak 240 HP 454 is every bit as strong as the new, high power 290 HP Vortec 454. GM BBC Mark IV, GEN V 396/402/427/454/502 Retrofit Pre-hydraulic Roller cam block to Hyd-Roller Cam '65-95. 060, but I learned on the Full Size Chevy forum that gapping them smaller at around. Put the car in gear and apply slight load, (AC on) and set the Idle as you like it. The idle speed is much too high, which makes it difficult to E-test under the heavy duty two speed idle test. i have replaced the egr value intake gasket water pump fuel pump fuel filter coolant temp sensor idle air control value mass air flow meter clutch fan tps sensor plugs/wires coil pick up in the distribter rotor button/and cap fuel. You can plan local FSC meets in the Events Planning sub-forum and then tell us how it went in the Wrap Up sub-forum located inside. A little smoke on start up but not bad. 5/1 compression and a 288 duration roller cam that doesn't lope as much as you might think. 88 exhaustIt's my understanding that the Muscle-Car 454 "Chebby" and the 454 Vortec are two separate and distinct engines that just happen to have matching displacements. ATK HP98C Chevy 350 Complete Engine 345HP Our Price (USD): $3,869. It has started doing this gradualy for about 3 or 4 weeks and now its frustrating. 50 EdelRPM Airgap w/750 Holley. 4L Magnum MPI. The engine idles at 1300 rpms when in park, the wierd thig is that I can put the truck in neutral going 40 mph, and the rpms jump to 2000. There doesn't appear to be any air leakage around the throttle body housing. Stock-like idle. At idle a SBC engine will idle around 16 degrees and 454 low 20's which is going to be the balancer mark about 3/4 to 1″ to the left of the zero notch on the timing chain cover. Holley 300-263 Efi Single Plane Intake Fits Sb Chevy V8 With L31 Vortec Heads. See important note below. When shifting into drive, engine runs at idle rpm, when throttle is pushed down to come off idle, engine coughs & dies. Can't get my 454's idle below 800 rpm, during warm-up it will run at 1100-1200rpm then drop down to 800. We can also equip your engine with the exclusive March Performance serpentine belt system. BP-203 Street / Strip Camshaft Street / strip camshaft. Can someone please help with what I should check next, I have a 1998 Chevy K1500 5. Would some other owners of GM trucks with the Vortec 454 let me know what temperature your engine typically runs at? My neighbor has the same truick and says his runs at that temperature also. 88 exhaustIt's my understanding that the Muscle-Car 454 "Chebby" and the 454 Vortec are two separate and distinct engines that just happen to have matching displacements. Now to the too much fuel. 0/1 CR, roller cam and broad powerband from idle to 5000, then the 454 Vortec is the way to go. It is a bored version of the Vortec 5300. I gapped them at. The camshaft w. Each cylinder had a 107. Page 31: Battery Cables DANGER Engine Maintenance Battery Cables volts and the idle alternator on the other engine may tension by pivoting. I have a really rough/missfiring idle, it seems to go away over 1500 RPM, but the car idles terribly at startup and gets no better when it is up to temp, it is bad enough to cause it to occasionally stall. 4L 454 HIGH PERFORMANCE Distributor NEW!! $79. A Very Special Ford GT40. I have replaced the idle air control valve with no effect. machine, 20 initial--16 mechanical--36 total at 3200 rpm, the B28 vacuum can was also installed. 4 big block. Diagnosing Engine Noises can be the most difficult thing a mechanic can do. 4L Magnum MPI. fuel pressure checks out ok. Its bore and stroke is 4 inches by 3. SYMPTOM SUMMARY The engine idles too high. Also the same pump as for the 1996-1997 Vortec 305/L30, 350/L31, and 454 L29 for all 1/2,3/4 and 1 ton trucks, SUV's etc. Locate parts near you. 4L V8 w/Dish-Top Pistons $479. This Edelbrock cam kit produced 540 HP & 530 ft-lbs. Just picked up a 96 Jimmy that is very clean,rust free and fresh paint, plan was to swap the 327 into it because the blazer rusted away, but I think I will try option 5 first. I have purchased a used 454 TBI for use on a '98 350 Vortec. 4L Vortec Motorhome with our system upgrades. The stepper motor drives a valve pintle which protrudes into a passage that bypasses the throttle plates. Most power is made that that heat range. Dart OE Vortec replacement head 165cc intake runner; RHS Vortec (available with either 1. When the Vortec engine distributor fails the vehicles experienced one of two popular symptoms. I am thinking of replacing the oil pump, but will that be a waste of time/effort. it idles around 1500 to 1800 rpm and it is. Things that might help with a project like this:. Running Problems. Worse problem is bad hesitation when accelerating after throttle at idle position, sometimes stalling. Check intake manifold and throttle body gaskets as well as vacuum lines. The Vortec 454 engine had 7,439 cubic centimeters, or 454 cubic inches, of displacement, giving it the 454 or 7400 name. Minus 25 is usually a massive vacuum leak, or maybe an exhaust leak of some kind on that side. The original owner ran Mobil 1 10-30 in it up to 150K miles when I bought it, and I've been running Mobil 1 ever since. 050 solid cam, very rough idle, low vacuum. 2L Engine Specifications. 4 - With Air Injection reactor emission system (A. Vortec 320 HP Marine 5. Like I said earlier, standard big block parts won't fit on the Vortec 8100, so the performance parts available for it are close to none. Check O2 sensor for a false rich reading which will cause ECM to lean the mixture to compensate. 4 L merc I/O, in either 1990, 1992, or 1996. Im shooting for 350hp from a 355ci, bowl blended and gasket matched vortec heads, aluminum Z-28 style high rise dual plane intake, 9. zukesofhazzard · Registered. The first sign of this situation often becomes a check engine light code P0300 for a random misfire. Have two choices of injectors, the 17104288 or the 5235231. The engine came to me with 2 bent exh. '97 GEN VI 454 Vortec It's a L-29 with closed chamber 100 cc heads. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. If temperatures go too high, you will have to shut down. 4 L spark knock and power. Check it for interference. I have spent countless hours going over the engine looking for vacuum leaks and believe every thing is OK on that front. Both compact sedans with 2. Please help. i have misted around the intake with starting fluid with no change as if a vaccum leak would turn up. It has 175,000 miles on it,1000 miles on intake gasket job, hoped that would the fix rough idle. I have a 97 silverado 3500 with the vortec 454 in it. 4 liter engine. 1966 327 High Perf. If an engine without computerized idle speed control is idling too fast and refuses to come down to a normal idle speed despite your best efforts to back off the carburetor idle speed screw or air bypass adjustment screw (fuel injection), air is getting past the throttle somewhere. Vehicle: 2000 Jeep Cherokee Sport, 4. I am a little surprised to see it running at just shy of 210 degrees all the time. 3L just doesn't respond well to larger duration / larger lift cams - the cubic inch just isn't there to utilize it. 5" stroke crank. Replacing the TPS and the IAC on the 91 GMC C3500. i changed the oil and filter which smelled like gas. does the miss only happen uphills and hard acceleration and goes away at idle or when throttle is reduced?. Also known as the Vortec 7400 (7. i have look and cannot see any vacumm leaks. All PSI Harnesses are Made in the USA. I recently got a 98 GMC K2500 with the 454 engine. A vacuum leak on a fuel injected engine will cause high idle. Pictures and diagrams of serpentine drive belt routings. This way, when low throttle input was used, low power output is produced. 1 For access to the idle stop screw, pierce the cap with an awl and carefully pry the cap from the side of the throttle body. MAG MPI (500 hrs). Heck it even shifts smoother. stock transmission & gear ratios. 454 Chevy Big Block V8 Camshaft and Lifter Kits in-stock with same-day shipping. Bore, Standard Rod, Standard Main, Chevy 1991-95, 454, Kit Not Yet Reviewed Part Number: FEM-CSMHP789-000 More Detail. Re: Low Oil pressure 454 Mag Ran this by my mechanic. just completed an install on a brand new L31 Vortec engine. The L96 offers classic Big-Block grunt with all the modern advantages of an LS engine. When you crank it after it is good and warm, it starts idling about 400 rpm`s but after about 45 sec. The 1990-1991 Chevrolet 454 SS pickup helped kick off the muscle-truck trend. 1 is (50,000 miles). Don’t set it too high, as this will cause causes excessive clutch and brake wear. 01-31-08 08:22 PM - Post# 1355689 In response to CDAUSA it is new to me. Also the same pump as for the 1996-1997 Vortec 305/L30, 350/L31, and 454 L29 for all 1/2,3/4 and 1 ton trucks, SUV's etc. While every factory Ford GT40 is special, some are more special than others. My sbc 283 from 1967 lives at 20. I've got a 99 C3500HD truck with the 7. So I took off the upper intake, and found that the Nut kit (the fuel lines running into the injectoer), were leaking badly and dumping fuel into the. i have a msd pro billet distributor in my 327, i had it set up on a dist. I've been reading quite a bit about actual GM vortecs and it sounds like the engineers really put a lot of time and effort these guys. To get a lumpy idle in a big block usually takes about 280 (advertised) degrees duration though, kinda depends on stuff like lobe seperation too. When the cars idle gets rough, it hard to comprehend the related causes. 93 Chevy Pickup High Idle: Sign In I have a 1993 Chevy 1/2ton pickup 2wd with a 5. fuel pressure checks out ok. 6-mm stroke. When it comes to making cheap and easy power with almost any V-8, it's hard to beat a camshaft swap. As such, the 454 Big Block was reappointed with Sequential Fuel Injection in 1996 and successfully met On Board Diagnostics II standardization and efficiency requirements and was dubbed the "7400 Vortec", a moniker that drew from the popularity of Chevrolet's torquey 4. I bought a 1990 Chevy 1500 pickup several months back. Pictures and diagrams of serpentine drive belt routings. After running fine last night, and for a good portion of the day, I was on. The MAF is set to fail on first code, Fail freq=0 for VE tuning yet. Cleaning and Resetting Your Idle Air Control (IAC) Valve Posted On : February 11, 2018 Published By : admin [sswfb_post_share] What you will need for the following procedure is carburetor cleaner and a wrench big enough to remove the IAC valve. 7L engines is shown on the right. Rings+Bearings+Gaskets (ALL STD Sizes) $353. Holley 300-263 Efi Single Plane Intake Fits Sb Chevy V8 With L31 Vortec Heads. i have replaced the egr value intake gasket water pump fuel pump fuel filter coolant temp sensor idle air control value mass air flow meter clutch fan tps sensor plugs/wires coil pick up in the distribter rotor button/and cap fuel. 0L, 6-cyl, 94K miles, 10W-30 oil (OEM spec) I’ve always used full synthetic oil in this vehicle, due to the sub-zero winters we have here in Minneapolis that turns non-synthetic oil into molasses. 7 L Stock Block, 4 Bolt Mains L-31 Vortec Heads, Edelbrock Cam & Intake, Holley 650, Flowtech Headers, Magnaflow exh. The Chevrolet 454 engine was a part of the 2nd generation of Chevrolet big block engines. Symptoms you state are caused by leaking head gaskets, worn camshaft lobe, carb out of adjustment, leaking, sticking or plugged PCV or EGR valves, bad plug wire, improper idle mixture, incorrect timing, uneven or low cylinder pressure. General Q & A - 1997 454 Merc. This engine is a mild idling High vacuum street engine for a stock stall converter automatic with big torque from idle to 5000 rpm it is Idea for a daily driver rod and deluxe comfortable show car. So 8-10 psi at idle is bare min. Shop 454 Chevy Big Block V8 Intake Manifold/Carburetor Kits and get Free Shipping on orders over $99 at Speedway Motors, the Racing and Rodding Specialists. Unlike the popular Chevy 427 that was used in a wide variety of automobiles, the 454 was used only in high performance cars like the Chevy Camaro, Corvette and Chevelle. I was thinking of trying a thicker oil in it. The LS based small-block engine is the primary V8 used in General Motors' line of rear-wheel-drive cars and trucks. I gapped them at. Given these two Chevy engine light codes, I would say they are both caused by the same concern. BEST SELLERS. When the cars idle gets rough, it hard to comprehend the related causes. Hi i am new to this forum and in desperate need of advice. (note-a fresh engine will usually run a bit hotter than normal due to increased friction of the new parts) If all goes well, you'll make it to the 20 minute mark without any problems. 4 big block. 4L V8 w/Dish-Top Pistons $479. 1 is (50,000 miles). 0 Vortec engines with RPO Codes LR4, LM7, L59, LM4, LQ4, and LQ9 with a Drive by Cable (Mechanical) Throttle Body and Multec Injectors. '97 GEN VI 454 Vortec It's a L-29 with closed chamber 100 cc heads. Our experts aim to provide you with everything, aside from a spare pair of hands, to fix. Engine: Vortec 4800 V8: Vortec 5300 V8: Type: 4. The highest I've ever gotten my 454 to rev is about 3800. When your AC compressor kicks in or power steering is activated as you suddenly turn the steering wheel, the sudden drag o. I have been tuning it for the past couple of weeks. Differences include bore and stroke, intake valve size, and smaller combustion chambers. repair history,new plugs ,wires ,cap , rotor,filters. so far i have taken throttle body off and cleaned,replaced the iac. 4L, Regular Production Option designation L29), Chevrolet's Vortec 454 was a modern-day evolution of the company's most legendary big block. It was an eight-cylinder engine with a multi-port fuel injector, and each cylinder had two valves that were operated by hydraulic roller cams. 7 Vortec starting problem; 89 running badly; 1999 454 high idle; 93 2500 clutch ajustment ? How do I know what Tranny I have??? 1996 5. Don't want to be left stranded in the middle of nowhere. Right now it has the 17104288 injectors but am uncertain as to their condition. What is the normal (expected) idle under normal weather conditions. I wouldn't worry too much about a high volume pump sucking the pan dry, you have a 7 qt. Torque the high RPM stop bracket screw to 70 in. Frequent battery or alternator failures - Overtaxing the capacity of a standard alternator can shorten the life of the battery and alternator itself. What is the Fan Clutch? The fan clutch is a coupling device that is located between the water pump shaft and the fan. July 4, 2016, 8:06pm #1. 1990 Motorhome with a chevrolet 454 motor at 70K miles. Most vehicle’s engines will idle at our below one thousand RPMs. good parts no cheap off brand. CPI V-6 and V-8 engines run at 60-66 PSI and 454 sequential engines run at 56-62 PSI fuel pressure. 600 valves) EQ "Lightning" Vortec Style Cylinder Heads (Cast Iron) On the non-bow tie L31 Vortec heads, the ports are larger than the older cast steel heads, so they outflow the older heads. The Vortec 7400 L21 was a commercial version of the Chevrolet Big-Block engine used in the medium duty truck platform. Manufactured using the highest grade materials and the. Heck it even shifts smoother. When shifting into drive, engine runs at idle rpm, when throttle is pushed down to come off idle, engine coughs & dies. Save up to $12,840 on one of 11,552 used 1999 Chevrolet Silverado 1500s near you. 4L MPI, and the 385 Hp 454 Magnum MPI Sterndrive Model and 380 Hp 7. Bare min is 10 psi per 1,000 rpm. The truck idles about 750-850 rpm`s in - Chevrolet 1986 K1500 question. A little charge of the battery she fired right up. I also have a pair of camel back heads and headers. I have a problem with a 98 Chevy 4x4 5. It was an eight-cylinder engine with a multi-port fuel injector, and each cylinder had two valves that were operated by hydraulic roller cams. PowerAid 96-00 Chevy / GMC C/K 454 Vortec. Good luck, I can't wait to hear the outcome. SYMPTOM SUMMARY The engine idles too high. On 2003 and newer applications leave a note with your year so we can install green retainers on the harness. ACDelco is a true OEM parts brand offering 90,000+ auto parts for Chevy, Buick, GMC, Cadillac, discontinued, and non-GM cars or trucks. I'm much more familiar with fuel injection so the carburated 454 is a bit of a mystery as of now. They will hang there until I come to a stop. The number one cause for high idle is an imbalance in air pressure. A couple of observations - I originally put in plugs for peanut port heads, but replaced them with the correct plugs for vortec heads. Replaced wires, plugs, distributor cap/rotor, tps, ignition module, map, IAC, engine coolant temp sensor, rebuilt fuel pressure regulator and new alternator. But herein lies the problem, we are using this platform in a Motorhome not in a race car or high performance boat. A little charge of the battery she fired right up. (fast idle control device) valve. i have a 99 dually 4door 4x4 7. Un-tie the string and allow the rpm's to come down. I have a 1989 GMC C3500 with the 454 motor. Very smooth idle. This is a street engine that runs on 87 Gas and makes just under 800HP and 729 ft/lbs of torque! We then added a Plasma Ignition System (circa $500). Details about 1996-2000 GMC 7. The unique Helix Bore design of the PowerAid creates a spinning action of the incoming air. 500 lift 113LSA), comp cams valve springs, 29lb/hr ls1 injectors and an 0411 pcm. 1986 beige lx 5. 75-8 1965 327 High Perf. Although this large displacement engine produces considerable horsepower and torque, it was retired in favor of a more economical engine platform. Vortec Firepower Ignition Kit Choose an option Vortec Firepower Kit - 4. I got it running very poorly back fireing thrugh the exsaust lightly (poping), etc. Save up to $12,840 on one of 11,552 used 1999 Chevrolet Silverado 1500s near you. The motor is out of an 88 1 ton pickup and is in a 89 1/2 ton suburban. what did you use for mounts i am putting a 454 in a 66 c10 , i am having no luck finding motor mounts. Chevrolet Performance's 454 HO crate engine is a Big-Block bargain - an affordable engine with performance specs that will make you think it's 1970 all over again. When the engine is cold she starts up just fine idles at 1100rpm and drops down to the appropriate idle. As it sits right now, I have a 90' ext. Whats in the kit?. fuel pressure checks out ok. In gear, with my foot on the brake, the idle would surge from 600-900, maybe a 2 second cycle. Another possible upgrade, find a throttle body for a 454 and consider an Edelbrock intake. Cast iron cylinder heads deliver a pump-gas friendly 8. I am at odds on which injectors to use in the throttle body. I changed the Idle Air Control and it didn`t seem to help. 1ST PROBLEM -ON COLD STARTS THE ENGINE RACES UP TO 1,800 RPM FOR ABOUT 5 SECS,,,, WHAT A NASTY THING TO DO TO A POOR F. Applications using a turbo or supercharger may have a 2- or 3-bar MAP sensor. Aluminum single plane high rise Performance manifold for 5. 4L 454 Truck $339. Would some other owners of GM trucks with the Vortec 454 let me know what temperature your engine typically runs at? My neighbor has the same truick and says his runs at that temperature also. Assembly Lube. @hirschdalechevy, yes stock gm cam and heads. 4L Vortec Motorhome with our system upgrades. 1969 Corvette 427 High Perf. 3L just doesn't respond well to larger duration / larger lift cams - the cubic inch just isn't there to utilize it. 4L , 87-90 Edelbrock 2604 Performer Air-Gap Intake 1987-95 SB Chevy w/ TBI Heads See more like. However, this is one company who offers some very interesting Vortec 8100 parts. P0507 CHEVROLET Meaning The Idle Air Control (IAC) valve is a Powertrain Control Module controlled stepper motor located on the throttle body. I got it running very poorly back fireing thrugh the exsaust lightly (poping), etc. So, that's what we set about doing with our 65,000-mile '96 5. please click on one of the links below to purchase your New Delphi MFI Spider unit today! 1996-2007 4. 5 pipes, holley high flow fuel pump, T-5 tranny, 8. LSX 454 Big Block Power for the 21st Century. It is an iron/aluminum (2000 model year engines had cast iron heads) design and produces 300 horsepower (220 kW) to 325 horsepower (242 kW) and 360 lb·ft (488 N·m) to 370 lb·ft (502 N·m). 7, but 1000rpm sounds like a high idle, not where it should "bottom out". 3 Start and idle the engine until coolant reaches normal operating temperature. Look for a high engine idle. 94 performer rpm aluminum heads, performer rpm airgap intake, performer rpm cam, roller rockers,moroso oil pan, edelbrock 600cfm carb, bbk shorties, offroad h-pipe, flowmaster 40 series mufflers 2. I have a 1990 chevy suburban*****1500 with a 5. ARC PC3001 Big Block Chevy Dual Plane Aluminum Intake Oval Port, Idle-6000 RPM Special Purchase!! For sale is a new aluminum dual plane intake for big block Chevy engines. I ran a 16# in my 32 roadster and the fairly new Walker radiator split a seam at the top. vortec high idle. It idles like it should when the engine is cold. P0507 CHEVROLET Meaning The Idle Air Control (IAC) valve is a Powertrain Control Module controlled stepper motor located on the throttle body. GEARJAMMER1986. Another option to try includes fuel system additives, which clean fuel injectors. Get the best deals on Complete Engines for Chevy 7. SBC CHEVY VORTEC INTAKE MANIFOLD ALUMINUM# PC-2006Fits engines with V8 GM Vortec heads only. The Chevy 454 came in three variations; there were the LS5, LS6, and LS7 which never reached the general public, since the LS7 was used for high-performance applications such as the Chevelle and the Corvette. Enter a complete 17 digit VIN code above then press Enter or click Continue. High output aside, don't expect your alternator to do anything for you at idle speeds. When its cold (as in first thing in the morning), it fires right up and high-idles for a few seconds and runs fine. 180° design for power. 7 Idle surging,stalling in the alt. The Vortec 7400 L21 was a commercial version of the Chevrolet Big-Block engine used in the medium duty truck platform. then it dies, If I pump the gas it will choke some bit idle up and die. By comparison, the large sedan with a 4. MAG MPI (500 hrs). So don't yet to be concerned about Bank 1, but do find that problem with Bank 2. Idle seemed a bit to high all the time. Replacing the TPS and the IAC on the 91 GMC C3500. The PowerAid was developed to enhance your vehicles off-idle to mid-range performance and efficiency. 000" stroke and bore sizes ranging from 4. I'm much more familiar with fuel injection so the carburated 454 is a bit of a mystery as of now. Now what I am wondering:. 190-195* is perfect opt. I see 28 kPA / 0. This way, when low throttle input was used, low power output is produced. If your using underdrive pulleys, this may highlight or worsen idle output problems. My engine has 17. 918 Volts when throttle half open. Both oif these engine models are easy to recognize by the large “Bread Box” style intake plenum mounted directly on top of the engine. Diagnosing Engine Noises can be the most difficult thing a mechanic can do. Master Engine Rebuild Kit FITS: 1971-1979 Chevrolet BBC 454 7. Looking for some feedback for a friend that i boat with on the 7. This package will include the following items: GMPP LSx Iron Engine Block Texas Speed & Performance Forged 4340 4. Running Problems. CFM Technologies specializes in GM Throttle Body Injection, Carburetor Spacers, and drag racing, circle track racing, and street & marine performance. 4L MPI, and the 385 Hp 454 Magnum MPI Sterndrive Model and 380 Hp 7. There doesn't appear to be any air leakage around the throttle body housing. Inspecting and replacing belts is an easy car and truck automotive maintenance procedure you can do yourself. ) fuel pressure - system will go lean, if pressure is too low. PowerAid 96-00 Chevy / GMC C/K 454 Vortec. 7, but 1000rpm sounds like a high idle, not where it should "bottom out". If you sit at a light for more than a few moments it will start to idle lower and lower until it stalls. )The thing is, its not a rough idle, it runs very smooth but just so low that it almost chokes, and surges when given gas. 4L , 87-90 Edelbrock 2604 Performer Air-Gap Intake 1987-95 SB Chevy w/ TBI Heads See more like. MUCH better pump than the EP386 TBI pump. I'm getting a high idle on the Vortec 350 in my Cruiser. Introduced in January 1995, it is a "clean sheet" design with only rod bearings, lifters, and bore spacing in common with the longstanding Chevrolet small block V8 that preceded it as the basis for GM small-block V8s. 3's from 1991 up, NOT the low pressure TBI 4. The engine is a 99 Vortec 454 in a K2500. High torque camshaft. 4L Magnum MPI. Vortec 454. Best for daily towing emissions compliant Truck / RV use under 8000lbs. 250" (standard) to 4. Number one, the upper bushing deteriorates and allows the cam driven distributor shaft to wobble. This way, when low throttle input was used, low power output is produced. 5 vacuum in park. Past Rigs: 2000 Chevy 2500 Reg Cab 454 3. 4L (454) V-8 gas Rail Chassis 1995 PI-1005 May require the use of "Park/Neutral/Reverse" switch PI-203. I have replaced all the sensors and the ECM, checked all the wiring and still no fix. Ensure your ignition if OFF. When the idle is high or low, it could be caused by a malfunction of this system or any of the individual components that comprise the system. Part number 12530283 is the Heavy Duty replacement engine direct from GM Powertrain and fits most 3/4 and 1-Ton G-Series Vans, P-Series Trucks, Silverado's, Sierra's. I'm getting a high idle on the Vortec 350 in my Cruiser. Those making 375hp or more do have to resort to 454 injectors though. I have replaced the idle air control valve with no effect. Manufactured using the highest grade materials and the. The truck idles about 750-850 rpm`s in - Chevrolet 1986 K1500 question. I have replaced the idle control valve/soleniod but this didn't make a difference. None of the regulators can force a pump past it maximum pressure potential. 64 results for vortec intake manifold sbc Save vortec intake manifold sbc to get e-mail alerts and updates on your eBay Feed. Unlike the popular Chevy 427 that was used in a wide variety of automobiles, the 454 was used only in high performance cars like the Chevy Camaro, Corvette and Chevelle. The engine has a little bit of lower noise in it and runs about 20 psi at a hot idle in gear. 2- D- Drive 3 - Where two speeds are listed, lower speed indicates idle solenoid disconnected. All PSI Harnesses are Made in the USA. 7 L31 crate motor, carb intake built for the vortec with a TBI adapter plate. Remove fastener from flame arrestor. Re: High Fuel trims on 1998 5. 7 fuel regulator; 98 5. Sign In Gotta be honest with you harborguy - I haven't opened the hood of a "Vortec" 7. To get a lumpy idle in a big block usually takes about 280 (advertised) degrees duration though, kinda depends on stuff like lobe seperation too. is most apparent in the Vortec 454. org guys are using the victor jr 2bl intake for vortec heads with a tbi adapter. Engine: Vortec 4800 V8: Vortec 5300 V8: Type: 4. 540" lift generates a nasty idle. You can monitor the PCM(computer) system to 'see' what the PCM is seeing. oil pressure is great. Use; Designed For The Engine Swap Market~Not Legal For Use On Pollution Controlled Vehicles~Recommend Edelbrock Gasket PN [7203] for Manifold Gasket~Use GM Intake Gasket PN [10181398]. Great power throughout power band. Aluminum single plane high rise Performance manifold for 5. 7 Carbed Vortec Crusader Timing Mark;. See more ideas about Summit racing, High heat paint, Oil additives. Re: Low Oil pressure 454 Mag Ran this by my mechanic. I have a 1989 GMC C3500 with the 454 motor. So, perhaps in an attempt to get more low-end torque for. pan and likely will not rev the BB high enough for long enough to become an issue. Tried a new air idle valve, no luck. 7L LS1/LS6 LS1 Wiring Details GTO Wiring Details. The ECT sensor is a thermistor that varies resistance as temperature changes. It runs but of course I want more power on a budget. 3 vortec intake manifold Save 4. Inlet has a small screen inside fitting. This is a discussion on Better idle with Mass Airflow Sensor unplugged within the General Help forums, part of the LSx Technical Help Section category; I have been chasing down an idle problem and decided to unplug the MAF to see if it would run. If you sit at a light for more than a few moments it will start to idle lower and lower until it stalls. Im putting a vortec 454 in my 78 Camaro with a th400 transmission and 3. 7l engine with tbi. 0L, 6-cyl, 94K miles, 10W-30 oil (OEM spec) I’ve always used full synthetic oil in this vehicle, due to the sub-zero winters we have here in Minneapolis that turns non-synthetic oil into molasses. The Causes of Internal Engine Knock, and How to Eliminate it. Based on the same powerhouse offered in Silverado HD trucks, with 50% greater horsepower than the old 454 engines, L96 is the perfect choice for work and fun. The original owner ran Mobil 1 10-30 in it up to 150K miles when I bought it, and I've been running Mobil 1 ever since. 1975-1976 Oldsmobile. 1988 Chevy C-3500 2wd (no pic) 350 c. runs rough until its warm. Set the idle speed at this point. 4L Models Only Test spring pressure with damper shield installed. The stock heads, intake manifold, and 78mm throttle body just won't flow enough air to make much more HP natural aspirated. I have a 96 1500 5. I have a 97 silverado 3500 with the vortec 454 in it. Their larger plenums and runners match the free-flowing exhaust, high-lift cams and other modifications of a high output engine. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. When its in gear at idle (like a stop light), it struggles to stay above 500 RPM, and will occasionally stall. To get a lumpy idle in a big block usually takes about 280 (advertised) degrees duration though, kinda depends on stuff like lobe seperation too. Steady idle: Steady 14 to 16 inches: Incorrect ignition timing. None of the regulators can force a pump past it maximum pressure potential. So don't yet to be concerned about Bank 1, but do find that problem with Bank 2. Does not fit tall deck blocks. Specializing in automotive cores, hard parts, and used inspected automotive electronics Not seeing what you're looking for or have any questions? Reach out to us. It was an eight-cylinder engine with a multi-port fuel injector, and each cylinder had two valves that were operated by hydraulic roller cams. she starts at about 2500 rpm and finally comes down to 1200 rpm after awhile. (454 N⋅m) at 4000 rpm 2005-2007. Stock-like idle. When shifting into drive, engine runs at idle rpm, when throttle is pushed down to come off idle, engine coughs & dies. Almost all the information available today on 454 performance is directed towards high performance street engines that require high horsepower and rev to 6000 RPMs or higher. 977 Volts when idle and 27. I started using the file for LS2 that is a template file as a starting file, and I update all information that need to be update as far as I know. thermostat QUESTION Discussion in 'The Hokey Ass Message Board' started by tred, May 28, it takes time to burn the lean idle mixture and GM engines require quite a bit of additional advance at idle. BD TURNKEY ENGINES are GM GENIII Engines that are obtained from wrecking yards primarily from California & Nevada. Slide or tap the high idle stop to the right until it is against the engine control lever. I have replaced all the sensors and the ECM, checked all the wiring and still no fix. 3 angle grinds on both sides, 480HP potential naturally-aspirated, and valve train is rated beyond 7k without. Buy BBK Performance Parts 1710 at JEGS: BBK Performance Parts Power Plus Throttle Body 1996-98 GM Vortec Truck 305/350/454. You cannot adjust the idle speed with a setscrew or any other mechnical adjustment. Mercruiser 454 Magnum MPI Models The 454 MPI came in 2 different Hp version’s being the 330Hp model which was known as the 7. Another cause of high idle could be the air intake boot which delivers air into the intake system. 3 L) to 400 cu in (6. Push Rods for New Lifters. If an engine without computerized idle speed control is idling too fast and refuses to come down to a normal idle speed despite your best efforts to back off the carburetor idle speed screw or air bypass adjustment screw (fuel injection), air is getting past the throttle somewhere. Vortec 320 HP Marine 5. Ditto fellas, I just bought an 01 silverado 5. The 454 died in 2000 to 2001, but the vans dropped it after 2000. With the 454, putting in Vortec 350 code and chaning the displacement and enter in the tables/constants/switches appropriate to the 454 is all that is needed. Tried a new air idle valve, no luck. Air For Cleaner 454 High Performance Chrome Big 454 454 Emblem Chevy Block with with Emblem Block Chevy Air Big Chrome 454 Performance For 454 454 Cleaner High BLACK Cold Air Intake System+Heat Shield for 99-06 GMC/Chevy V8 4. CPI V-6 and V-8 engines run at 60-66 PSI and 454 sequential engines run at 56-62 PSI fuel pressure. It idles like it should when the engine is cold. I believe it is a Bravo One drive. Both oif these engine models are easy to recognize by the large “Bread Box” style intake plenum mounted directly on top of the engine. 4 liter engine. 7L Vortec Chevy Tahoe which I bought a month ago.
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