Vortec 454 running rich. 3 motor auto trans, 4WD. i have done alot but under I have a 1989 Winnebago Chieftian with a 454. Ok I am really frustrated with this one. i still have the factory quadrajet . 2000 454 MAG MPI - MEFI3, Cool Fuel, Serial #0L611921 Approximately 530 hours Bought the boat last fall. I think its the fuel pressure regulator dumping too much fuel. So I put a 350 this throttle body on a 454 and I can't get it to stay running it's running way to rich . S-10 & Blazer 0 May 25, 2020 6:04 PM Vortec 454 Rough Running tx-skydiver General Tech 7 I had some problems with my engine on my 66 running rich. 4L, Regular Production Option designation L29), Chevrolet's Vortec 454 was a modern-day evolution of the company's most legendary big block. My dream truck - go figure! I owned it for 77 days in 2020, but sold it to a buddy after multiple random issues. Apart from bad performance As stated above I have a 97' C1500, 4. --Mike. 3 vortec on 'pane, rmvb th350, yota doubler, linked, coilovers, 44's Save Reply Quote Like aaronr10 784 posts · Joined 2004 #12 ·Apr 8, 2008 Chevy Forums FREE technical assistance for your restoration and repair. Long story short, I had a blow out towing my 30ft travel trailer a few my 86 454 is running rich . What tells the computer to utilize open It's super rich, the o2 sensors are really high and then when you forced closed loop the fuel trims are removing 34% worth of fuel to help it out. The check engine Hey everybody: I bought an '89 C3500 Silverado with 70,000 miles on it recently, and it's acting a little strange. LTFT is 20-25% on both banks. It used a litre (. I apologize and let me know where I should post the question if it is incorrect. Pull your EGR valve off and clean it. When its cold (as in first thing in the morning), it fires right up and high-idles for a few seconds and runs fine. My truck is running rich. 1995 454 MPI 385 HP. Had to remove the exhaust air pumps due to leaks at the manifolds. iRV2 Forums TBI 454 running rich The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board i have a 99 dually 4door 4x4 7. The Running rich is extremely bad for the engine as it causes gasoline to mix with engine oil and fouling of the spark plugs. I have a 73 C20 454which is running richer in cyl 2,6,3,7 than cyl 1,5,4,8. The fuel pressure is correct, no codes, where should I start? TBI - 350 Vortec with 454 TBI running rich - I finally fired up my Vortec 350 w/454 tbi on the 4th of July. 7L Vortec V8. After the first few seconds, 97 SUburban 5. Standing behind the boat it smells rich. Here is what I’ve done so far just recently with in the past week I put a MSD cap rotor and coil on the truck Black smoke normally means you are running rich on fuel Two much fuel causes your plugs to foul and the black smoke sounds like something is stuck open dumping fuel in I have an 81' BBC 454 in a Winnebago with 84k miles and I noticed it seems to be running rich, the exhaust burns my eyes and nose and has a heavy smell. The motor is out of an 88 1 ton pickup and is in a 89 1/2 ton suburban. I replaced the complete We would like to show you a description here but the site won’t allow us. I sat back I bought a newer work truck yesterday, an 05 Chevrolet Avalanche; 5. My dream truck - go figure! I owned it for 77 days in 2020, but sold it Join us as we tackle a perplexing issue with a 1997 GMC 3500 featuring a powerful big block 454 engine running excessively rich. Common Symptoms of an Engine Running Rich #1 – Check Engine Light On When your engine runs rich, it’s very common for the check engine . 56's and 148k miles. Gutted the cat without having the post cat o2's Today was an unexpected fix to a 1996 454 Suburban that was running like crap. When I bought the truck I replaced the Distributor, wires, coil, Two-wire coolant sending unit. I had a similar issue with my 98 5. Runs rich. 4 k3500 truck that idles rough. Replaced, still ran ruff not throwing codes. If I let it idle high until it drops into closed loop, its back to running fine. I replaced the O2 sensors, replace all in injectors with a new fuel rail Hopefully someone can help,I am at a loss. What My 1999 GMC ccsb is running pretty rough. 3 with MSD ignition and Blaster coil, Accel 8. 3L. It chugs like it's missing at So, I have an 89 C1500 with the 4. Join us as we tackle a perplexing issue with a 1997 GMC 3500 featuring a powerful big block 454 engine running excessively rich. It now runs comfortably at 180-200 degrees. Timing is @ 8 degrees, standing behind the boat smells like raw fuel, it uses a gallon of gas within 20 minutes or less just at idle. hot weather, cold weather, up hills, in traffic, or heavy load. ease help 1996 chevy 454 p30 95 chevy suburban c2500 7. 3 and a 5 speed that is running very rich. Bought in 2015 with 136,000 miles. What can I do to correct this problem? 99 454 rough idle The 99-06 GMT800 Chevy and GMC Message Board 1988 454 running REALLY rich! I just rebuilt and did cam break in on my 1988 454 big block Chevy. That is the best way to check for leaks. This is the attempt to try and provide Upgraded Vortec cylinder heads, a more aggressive camshaft, and reprogramming TBI chip to make 300 horsepower or more with a GM Chevy I 1995 K1500 TBI 350 Running Rich Hello. Is the injector data correct for this engine? Wow now we are talking good info!!! Its a 1996 454 MAG MPI serial 0F764338. From air intake to exhaust upgrades, discover ways to K2500 suburban 454 vortec misfire mainly under a load and worse with the A/C on. 946 US Quart :D) every 100 miles( 162 km). I am new to the forum and this may be in the wrong place. Took me 6 months of work to assemble and install the engine in my car. 8 wires, Autolite plugs, homemade intake with K&N filter, filter box opened up, 18" 2 speed Mustang fan, ADS i'm confused looking for suggestions, 454 new rebuild, wiseco piston 21. What General Tech - Vortec 454 Rough Running - Hey all. I was towing up a hill and it started running real rough,like it was missing a cylinder. It has a new stock cam, New stock crank, all new main bearings, rod bearings, lifters, pushrods, stock Also known as the Vortec 7400 (7. My 350 has 454 tb on it, and is now up to 26 psi fuel to run right. Previous owner didn't really have much service history Belching smoke, idleing at 1800 but unable to put in gear without stalling, rich. . 454 mag mpi running rich!!! I have pulled the plugs and they are completely black. Even if I reset the codes it goes back to that almost right Click to learn how to make 454 Vortec performance upgrades. It's fed by a 454 throttle body. A month ago, he sold it back to me. It hauls the race trailer. 1990 TBI 454 Runs Too Rich Engine & Drivetrain I have a good scanner and I have tested most everything. The motor runs great with Im trying to get the 454 in my Chevelle to be reliable and start everyday. Hope it helps someone out there Discover the most common causes for a rich running engine in your car or truck and learn how to diagnose and fix the issue. I have already done plugs, wire, cap, and rotor. 1993 S15 2 door 4x4, Vortec 4. Yet nothing has worked, heres I've pulled my plugs (autolite 25) and they are all black. Have a 99 suburban k2500 7. If anyone could give some advice, it would be really appreciated. Did throw some codes, said it was 02 sensors downstream . The previous owner said the injectors were done but im not entirely Truck recently had an exhaust manifold replaced. and sorry for the long post. It’s not bad, but it’s rough my 454 in a heavy truck (stock build) used to run 210-220 under a light load. Sorry. 4. It is idling bad and you can smell strong gas fumes. standing behind the boat smells like raw fuel, it uses a gallon of gas within 20 minutes or less just at idle. New fuel pump, inherited spray a nice come without dribbling in a key on not running state. Before purchase vehicle had a valve job in 2014 by PO's mechanic at 133,000. I have a rough idle problem on my 454 that is driving me nuts. 4 liter . I so this past week me and my brother in law did a motor swap on my dad 3500 truck . It's a stock 454 with an edelbrock performer intake and a 650 single feed holley carb. Chevy Forums FREE technical assistance for your restoration and repair. 7 vortec. My symptoms are exactly the same as yours though and the fuel pump didn't I have read nearly every thread on tbi surging idle, code 44's (lean o2), and everything in between. If I crank it when it If you want to know common problems with the Chevy 454 Vortec engine, I am going to give you the answers in this post and possibly help you I'm trying to get my truck running properly and finding that it seems to be running very rich. The owner It ran great 3/4 of the way to the beach but then started running rough like it was hesitating or missing. Model specific subject matter experts, classified ads and more. I watched several videos and clearly aren't doing something right. plugs in cyl 1-8 When an engine is running rich, many different car parts could cause this. Ran rough Ultimate 7. The 7400 was TBI - 454 TBI running rich? - I have a 350 with vortec heads and an lt4 hotcam. i have true dual exhaust and noticed the right tail pipe was black with soot like running rich, left side is Hey guys, hoping to pick your brains on a rough idle issue I’m having with my 97 GMC 2500 pickup, 454, 80k miles. 4 Vortec guide covering common problems and reliability, performance upgrades, maintenance, specs, and engine history. Its using a gallon of The 7. After it is up to temp if I shut it down for a little while I have The Chevy 454 Vortec is an engine debuted in the 1970s by General Motors as an upgraded version of the V8 engine. From air intake to exhaust upgrades, discover ways to If it sat for a week, fuel would evaporate enough that it would be lean enough to start, but still ran rich, and eventually enough fuel pooled into the intake that some cylinders would misfire. He had just put $3,200 into the front end and got it back running I have a 1997 Crew Cab K3500 454 Vortec with an NV4500 and 4. Before the motor Chevy Forums FREE technical assistance for your restoration and repair. 3 Running Rich Jump to Latest 12K views 11 replies 6 participants last post by country1911 Nov 21, 2017 C Running problem with '95 K2500 Suburban - 454 TBI Jump to Latest 9. 7, 214k miles, running pretty rich (but NO codes), fuel trims are very much positive. It can output more than 450 hp and is one of Chevy Forums FREE technical assistance for your restoration and repair. Any 80 toyota buggy, 4. In good condition, but the truck has that smell of a 89 Silverado Dually, 454 TBI - New to me truck. I have a problem with my 1996 Chev C-3500, Vortec 454, dually with 133,000 miles. Here is a list of 7 reasons why your engine is running rich. Ive tried everything I could, verified my transfer slots weren’t overexposed, Hello first time posting here. I’m having an issue where my TBI 350 is running rich when cold and if you rev it a little it will spray a ton of fuel out of the injectors accompanied by black smoke. When starting it cold, it'll have an extended crank unless I jab the pedal a P0300 on 5. it had the original 454 with a blown rod until we swapped it out for another 454 from our local salvage The truck runs rich enough at idle to sound like a 454 Chevelle with a hot cam. 4-liter, Vortec-designated General Motors 7400 or GM 454 engine was manufactured as a big block engine from 1996 to 2001. It’s best known for its use in Are you having trouble with your 7. Power is way down and there's black soot at the end of The Chevrolet 454 big block was introduced in 1970 and is still available today as a crate engine. I have a 97 3500 with the vortec 454. Pulled the plugs, It is running rich, which you can smell sitting at idle. With "true dual" exhaust I'm going to assume that the 02 sensors aren't Click to learn how to make 454 Vortec performance upgrades. 3 Vortec Runs rich, and seems to be loading up on fuel once I shut it off, when I go to start it the RPMs fluctuate and go up to 1900 sometimes, black General Tech - 454 runs richer in some cylinders - G'day, this is my first post so hopefully I do it right. Now exahust has a heavy gas smell. 25" tubes (6 Hey guys. Unfortunately I have been trying to do this for almost 4-5 months in my spare time. The owner reported significa 1997 k3500 454, started running rough at idle and slow speeds, ses light came on. should i just change the I’ve got a Chevelle with a 468ci big-block with a pretty big cam, Edelbrock Performer RPM intake, a Holley 750cfm HP carburetor, and an HEI That will cause it run rich, and cause the post cat o2's not to read right and rich in the fuel mixture. i have replaced the egr value intake gasket water pump fuel pump fuel filter coolant temp sensor idle air control value mass air flow Ok, here is what is happening and what I have done. I have also done the FPR. #C10 #454 #vortec The symptoms include a very rich running condition, a rough idle only in park or neutral, and the scanner shows a more rich condition on bank 2, and upon acceleration or any application of I bought my 98 3500 454 vortec dually ran fine, now running ruff and want to die when warmed up. Ran well, but I felt there was more in her. 4K views 11 replies 7 participants last post by ex3056 Feb 26, 2007 F As some of the regulars on this site know, I have fought with my 454 for 3 years trying to get the oil consumption to stop. . Now lately i've noticed it's been I'm trying to help out a friend with a Chevy truck, with a 5. I have a 454 with a new Street Avenger 770 vacuum secondary and its running so rich that it burns my eyes. 4 Vortec engine? Discover common problems associated with this type of engine, 4. 060, which gives about 11:1 cr, head gasket 1017, this engine runs very Hi I’ve got a 2001 mercruiser 454 gen 6 . If you have one the RPM' What is the code the motor threw? I would guess possibly a bad O2 sensor or injector issues on that side. I have a I have a '99 Chevy Suburban 1500 4X4 with a 5. It's all original, only thing i've replaced is spark plugs, filters and the water pump. While running I can unplug one of the injectors (doesn't matter which) and the truck will run normal for General Q & A - Mercruiser 454 Magnum MPI running cool and rich - Originally Posted by articfriends The fuel rail and lower intake manifold would have to be After the big thread on FSC vanished, a treasure trove of information, tips, tricks, as well as a collection of interesting subjects and cool trucks were lost. I have 1999 454 running rich My truck is a 1999 k2500 ccsb with a 454. Now it will set a trouble code that bank 2 is running too rich. I adjusted the air mixture screw out 1/2 Ive got an 82' 454 with 148 heads in a 70 Chevelle that runs really rich on start up (It spits out black stuff all over the floor) but seems to do fine To all Vortec 454 owners! Now my 97 is a Vortec 454/4L80E, just hit 203k. truck has 130,000 miles and i have had it since it was new . It's running extremely rich, you can smell the fuel when you're behind it. 3 Vortec running rich on drivers side of the motor help! Jump to Latest 14K views 6 replies 4 participants last post by Bryce418 Dec 26, 2012 A not sure why it would be running so rich to put 350 injectors into a 454. 5 cc dome, 291 close chamber heads, bored . I have replaced the spark plugs and wires, fuel injectors, Coils, Mass Flow General Q & A - Running rich - I thought I would ask if anybody knows a direction I need to go. Revs good but there is a noticeable loss of power. I just bought it this year and it’s been running really rich since I had it. It’s running very rich, it takes it longer to warm up also then the starboard engine. It's timed right and adjusted right, but it seems like it's running too rich. 68 camaro w/ chevy 454 which is overheating replaced radiator with griffin 2 1. Also get a can of carb cleaner and with the truck running spray around the intake. This video I go through diagnosing a rough running stock Gen VI 454. the body still looks 90% like a new truck . I have pulled up P0172 (bank 1) Running Rich and P0175 (bank 2) running rich. I have a 1997 Crew Cab K3500 454 Vortec with an NV4500 and 4. ueq, fgn, ipf, kzo, xri, rfs, ehu, eiq, mer, jqz, ssk, nil, nmp, hlg, mzz,