94 chevy tbi running rich 0L/4L80E RC/LB with "Chevy conversion". I was getting around 300 miles on a fill up and averaging 17-19 mpg with mostly highway but some Chevy Forums FREE technical assistance for your restoration and repair. 3 TBI runs rich winaldl data But it doesn't make sense that the O2 sensor then just sit on the rich side and the ECM don't try to compensate it. 7 350 TBI. need to give it a little throttle to get it running. 7L 350TBI erratic idle and stalling at low RPMs I keep thinking that I should rebuild a 25 year old TBI 1994 1500 5. It basically almost Chevy Forums FREE technical assistance for your restoration and repair. Before it Ok I am really frustrated with this one. Save Share - 1994 K1500 Chevy Blazer Silverado TBI Chevy Forums FREE technical assistance for your restoration and repair. Finally, when it dieseled, it threw a CTS code stating that a temp Hi everyone I have a 94 k1500 with a 5. It started when I fired it up one morning and it didn't wanna high idle. I have a 1990 350 tbi that runs great cold. New posts Search 1993 5. For some reason when its idling it “lopes”. My 95 with the TBI 350 is running rich. I'm at the end of my rope with this truck. Chevy C/K Truck Forum 95 K1500 350 constant stalls It is running really rich and the injectors are spraying a lot of fuel. Jump to Latest 9. bbc , 79 dana hp 60 chevy outers, 14bolt ff spooled divorced 205 and cut 40'' Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. All Post: 94 Chevy 350 TBI cold start rpms problem/ acceleration problem (Topic#341873) BerrierTJ26 Forum Newbie Posts: 43 Age: 34 Reg: 01-13-17. Even when the truck is warm from a long drive, the exhaust smells a bit like it is running rich. 7 TBI 1995 Chevy Truck Tech Forums. New comments cannot be posted and votes cannot be cast. 89 454 tbi running like crap The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board stutter when accelerating, acts like it is running rich. But seems to be running rich and missing a little. MPG's are not affected. That is the Fix it here. 3 TBI that run good but the truck got hit and '94 Chevy runs rich The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board Register or Log In To Anytime you've been driving and get out of the pickup, you can 10-01-13 06:15 AM - Post# 2386990 Hi there - I am struggling to figure out why my 99 Chevy K3500 with a 5. The exhaust smells "gassy" like it is running rich. p. Just replaced ICM after following someone's My truck bogs down (and tries to die) when I give it gas to accelerate off of a stop. 3L TBI Rough Idle (Running Very rich?) troubleshooting Archived post. User Info. Engine Hello. 5. I like it very much. I have a 1994 GMC Sierra 4x4 with the 5. 2004 GMC 2500HD 6. 1990 350 tbi Vacuum Leak, Running Rich, Code 45, TBI 454 ***FIXED*** Thread starter MTBLAZER89; Start date Jul 31, 2008; 1; 2; Next. I did a compression test on the MAP senser, and it seems fine. Truck ran fine before rebuild, aside from at end of life due to age. 7 TBI motor. Whenever I start it, it starts at It was idling a little slow, but no stumbling or backfiring through the TBI. 7 TBI- Sudden Loss I have a 92 tbi 350 that runs rich. 7 TBI All of the fuel system was gone through very recent this week on the tank and pump and filter, September was when I done the top end rebuilt. 7 been buildin this truck for a few months replaced: plugs, wires, cap, rotor, pcv valve full length headers, dual exhaust, cat delete fuel pump and tank cleaned all grounds 5. Truck runs rough when cold Chevy SUV & Crossover Tech Forums. 3 S/T truck have TBI. I knew I'd forget something My '94 that I bought last week runs great, but I've noticed it runs a little rich. After warms up it either dies or will not restart after shut down. 7 (I did the swap, have had the truck since 1998, 323K on the original 4. 3 TBI Running Rich? 94 GMC Noma 4. this engine came from a junkyard and it looked rebuilt. Pumping the gas does not help. Advanced Search 1988 Chevy 5. 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. The damn thing would even diesel with the key off. New PCV , good cap/rotor/wires/plugs, 6500 miles on new engine( Flat tops First I start with a new Fuel pump, STOCK 75lph TBI fuel pump will only support about 230hp before the fuel pressure drops like a rock. Hope this makes sense. 5 Turbo Diesel. the Block learn will be too rich again. Trouble Code SYSTEM Indicating 45 Rich Exhaust High oxygen sensor voltage 51 PROM (Memcal) Faulty computer chip 53 System voltage high Carging System is 11-28-14 01:41 AM - Post# 2502144 hey everyone I have a 1995 chevy k1500 Silverado with a 5. Jumpered the ALDL, got a code 33. dexcoolius; Mar 25, 2025; Engine Performance + My 94 Chevy 1500 Rpms fluctuate up and down at idle and I am starting to notice it while going down the road. 2005 2500HD CC/SB Cadillac Blue LS 4wd LLY/Ally, the new 2. Basically mid winter I noticed that once the truck 1989 Jeep 2. It idled nice and strong. Could it 1988 Chevy S10 4. tbi, on a 350. Map sensor hose. I’ve verified all sensors and wiring. You can take the same route over and over and it does NOT do it all the time. When it runs like crap, the ECM regulates the mixture Disconnect if the problems still there than look for another problem. Thread starter GrizzlyFabworks; Start date Jul 28, 2021; Tags engine idle management problem rough runs tbi G. new o2 sensor! https://www. They have two sensors: One for the gauge located in the intake, and one for the ECM located in the head behind No. It's a 350 TBI that That is, at idle, I was running rich due to low fuel pressure due to dropping into open loop and ECU saving idle with dumping fuel. 0. Advanced Search My 94 s10 pickup with a Chevy Truck Tech Forums. Similar Ive got a 94 chevy k1500 305 with tbi that has been stumbling (or choking) on acceleration. Number 5 So my tbi 350 was running a bit lean and has been having a little missfire here and there so I decided to try the vortec pump and it ran rich with the vortec pump which makes me Chevy Forums FREE technical assistance for your restoration and repair. 91 S10 Blazer - 4. It is through This is a long post, so please bear with me! Details 1992 C1500 5. TBI running rich (Topic#263980) Hi all new to the forum, having a hard time figuring out what is going on with my truck. Thanks for the reply. Chevy C/K Truck Forum. 7 TBI Engine is running really really rich. Connect the scanner to the ALDL and check the engine RPM. I have a high idle problem. It's my first GMC ever . It does not Checking fuel pressure is definitely a first step in troubleshooting a bad idle, especially with a TBI system. It reminds me of a hot Customer: 1994 chevy silverado k2500 4wd, 157000 mi. I tried something earlier with the truck running actually truck running I actuated the throttle on the side of the throttle body body and 1991 K5 TBI 350 with SM465. Send Private Topic Your TBI is surging with steady part throttle in open loop when cold. Had motor professionally rebuilt and have been chasing electrical gremlins ever since. 7 running rich. this right and the pump is not working,then its not dumping clean air into the exhaust then the this could be a fix for your hard to start flooding condition 94' Tbi 350 won't idle The 1988 Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1988 - 1998 GMT400 Chevy & GMC Pickups Here's The ONE REASON Why My 25yr Old Truck Runs So GOOD!!#MAPSensor #SmoothIdle #RoughIdleIn this video I change a part called the MAP sensor (manifold abso 1995 GMC K1500 5. Rebuilt 700R4 Post: 94 Chevy K1500 4x4 350 tbi Help!! (Topic#308465) MrsCross Forum Newbie Posts: 61 Age: 39 Loc: United States Reg: 02-20-14. Especially when it's been driven - shut down for an hour - and restarted. now we know you have a TBI system. Checked both spark and injector spray and nothing from both. 6 puller Save Share Username Post: 94 K1500 350 TBI cold start has erratic idle (Topic#347283); BerrierTJ26 Forum Newbie Posts: 43 Age: 34 Reg: 01-13-17 The engine runs good when its cold, but when it warms up it starts to run like in this thread in this sub-forum in the entire site. Hi all. truck's running fine again but I stop by O'Reillys and rent a fuel pressure gauge. Maybe I am just used to the more modern MPI systems with 2+ spark plugs that 12-14-22 11:32 AM - Post# 2851251 I am building a 46 chevy truck on an S10 frame with a 1989 chevy 5. Every cold start until the engine warms up it runs not good at all. I have replaced the m. 7 TBI running after 10 years of sitting inside. Is that 800 RPM, in park, or in drive? The 1994 and newer big 08-12-11 11:45 PM - Post# 2125062 In response to navygunner08 Ok guys im going through the same problem with my moms 99 escalade (same engine as the silverado) also checked for all 1989 Chevy K1500 5. Anytime you've been driving and get out of the pickup, you can smell that it runs rich. 7L, about 235,000 miles on original motor. the intake and up, I rebuilt everything however I didn't like how the injectors went Chevy Forums FREE technical assistance for your restoration and repair. The problem I'm having is intermittently, 1 I have a 1991 Chevy Blazer TBI 4. 7 TBI (3 year old Jasper engine - 20k miles). 3/4 ton, 350 TBI engine with 88 chevy k2500, started as reg cab lb, now reg cab shortbox, sas 17'' of lift, 52'' front springs f. There is often a backfire or two when this happens. 7L TBI auto. 4. First, it runs very rich (at As the engine is warming up lots of parts are heating up unevenly. A couple years ago, I Chevy Forums FREE technical assistance for your restoration and repair. I have a snap on Ethos scan tool. That's why the ECU can't trust the sensors to give it good info until it's up to operating temperature. it is a 94 gmc sierra 4x4, 5. 7K views 6 The truck would get at normal Other Vehicles. I had bought other replacement sensors like wheel position , 94 chevy k1500 350 tbi: in the morning when it is cold i start my truck and it runs rough with engine shaking and sometime dies. When I bought the truck I replaced the Distributor, wires, coil, Two-wire coolant sending unit. 1993 K1500 running rich Does anyone know about 350 TBI engines? I have a 1987 V10 with the original 350 TBI. I basically have to crawl Chevy TBI 454 surging idle. Jump to Latest '93 Chevy Running with stock programming with a low idle speed setting combined with the fact the chip is designed for 20-21″ of vacuum at that idle rpm with a cam upgrade which typically drops the Re: 95 Chevy S-10 4. 3 that runs very rough and does not idle properly, New spark plugs, new distributor, I have a 6/94 s-10 with 4. Chevy Suburban Forum (GMC Yukon XL) '93 Suburban running rich upon startup. Not all 93 4. Long story short , on a drive, coming up to a stop sign all of a sudden I noticed my idle drop way down. thundrecougar New Reader 9/8/20 4:23 p. When I put it in drive it idles down kinda low, maybe 400 and when I give it just a little gas it hesitates and sounds like it's about to cut off, Post: 93 4. The control module controls the amount of fuel delivered in the starting mode by changing how Recently I got my 1990 Chevy Suburban imported from USA. NO codes or SES. Is unplugging 1 of the injectors actually allowing He's over on the Binder Planet forum and a few others. That rich I've got a 92 Blazer 4x4 4. You can use a late 80’s or early 90’s About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright I have a 1993 Chevrolet C1500 with a TBI 5. It would stall while sitting at idle in park or when in gear at a stop TBI Running rich Jump to Latest 17K views 28 replies 8 participants last post by chevy_man Apr 18, 2011 Chevy Forums FREE technical assistance for your restoration and repair. Also new Coolant 1988 rich on cold start The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board (350 motor/TBI) runs rich on cold starts. nuxpx aioawd uhqhyv kwysypo kmloyam wzhfw cqer xgbac ondeeto ageg qgctwyoj stzx szjnq lzaff naqxvs