Tags

running rich

Project Sierra; Codes 33 & 45?

About two months ago i bought a $1500 94 Sierra off marketplace, and finally decided to tackle the service engine light. Its been throwing codes 33 and 45 ever since I bought it. Started with the basics (cap and rotor, plugs and wires, fuel filter) along with a new battery, alternator and...
- kzvwrld
- Thread
- Oct 12, 2023
- code 33 code 45 map sensor running rich sierra
- Replies: 1
- Forum: Engine Performance + Maintenance
95 350tbi won’t run right!

Alright let’s see how this goes. Got the truck. Didn’t run well. Figured out that everything was pretty shot and needed to be replaced. Replaced every single sensor for engine performance. Rebuilt the throttle body ( brand new injectors ). Cleaned fuel lines and fuel tank. Changed spark plugs...
- Noah1167
- Thread
- Oct 2, 2023
- dumb running rich running rough
- Replies: 6
- Forum: Engine Performance + Maintenance
I
1995 K1500 TBI 350 Running Rich

Hello. 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. It runs fine when it’s warm. I recently replaced the intake gaskets, cleaned the EGR valve and replaced the CTS. Fuel...
- IndexOf0
- Thread
- Aug 20, 2023
- driveability running rich tbi
- Replies: 23
- Forum: Engine Performance + Maintenance
P
1989 K1500 5.7 350 TBI running rich and pinging after engine rebuild, LOSING MY MIND

1989 Chevy K1500 5.7 350 TBI. Had motor professionally rebuilt and have been chasing electrical gremlins ever since. Truck ran fine before rebuild, aside from at end of life due to age. Engine was rebuilt to factory specs but with factory-style roller cam instead of the original flat tappet...
- poolguybri
- Thread
- Feb 27, 2023
- pinging running rich surging idle
- Replies: 8
- Forum: Engine Performance + Maintenance
C
"Stock" 1991 K2500 5.7L V8 fails smog with unburned gas at exhaust.

Just bought this truck from a curious, inventive fellow. He built his own carburetor out of mason jars for a home-brew small house generator.... On the truck, some things he's done well, and others have been questionable. So I say "stock" because I'm not entirely sure what he's done to it. For...
- chevilex
- Thread
- Nov 2, 2022
- california newbie running rich tuneup
- Replies: 17
- Forum: Engine Performance + Maintenance
J
93 GMC K1500 Code 45

Hi everyone, I have a 1993 GMC K1500 I bought with 160k miles a little while back, and it has an issue I have been totally unable to fix. My mechanical knowledge is pretty limited, but I figured this would be a good car to learn on. When I first bought it, it would randomly stall at idle every...
- Joey99
- Thread
- Jun 16, 2021
- 305 code 45 running rich stalling surging tbi
- Replies: 5
- Forum: Engine Performance + Maintenance
T
Running lean or rich never perfect

Daily driving a 94 K1500 Z71 extended cab. I love the truck and I'm looking to get the best performance possible on a tightish budget. The engine was rebuilt mainly back to stock. The TBI was also rebuilt. The only upgrade was a 450 lift cam. the issue I'm having is my TBI just can't seem to...
- tdrewh
- Thread
- Apr 26, 2020
- big cam running lean running rich tbi
- Replies: 3
- Forum: Engine Performance + Maintenance
1999 454 running rich

My truck is a 1999 k2500 ccsb with a 454. I just bought it this year and it’s been running really rich since I had it. I replaced the O2 sensors, replace all in injectors with a new fuel rail and fuel pressure regulator, new fuel filter, new fuel tank with a new fuel pump, then I replace the...
- Dusty Parks
- Thread
- Nov 15, 2019
- k2500 running rich vortec 454
- Replies: 8
- Forum: Introduction