1992 Chevy Camaro Hunting for an idle (intermittent)

Tiny
92RS_GUY
  • MEMBER
  • 1992 CHEVROLET CAMARO
  • V8
  • 2WD
  • AUTOMATIC
  • 77,387 MILES
Hello, I have a idle problem. I am a mechanic and have had 4 other ase certified mechanics look at this car. This car is driving me insane, I have zero known vacuum leaks, the iac is operational I have used a known good ecu the car idles rough, starts hard, no matter hot cold or warm the problem is intermittent and I think the problem is fixed but out of no where the car starts all over with the idle problem. The code it keeps tripping is the o2 sensor left bank(lean) but smells rich. All parts that are good. (Vacuum lines, egr, o2 sensor, iac valve, maf sensor, fuel injectors, fuel pressure, intake manifold gasket, spark plugs, wires, ecu, distributor, rotor, cap, timing, gas is good in car, oil pressure, when car runs right it runs AMAZING, but it will always go back to the idle problem eventually. ANY ADVICE. Anything will help! Please contact me.

1992 Camaro Rs 305 throttle body injected with automatic trans. 77387 miles
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Monday, April 13th, 2009 AT 12:36 PM

4 Replies

Tiny
BLUESKYWALKER
  • MEMBER
My son is having the same problem. Did you find the problem yet? If so please let me know. He is at his wits end! Thank you.
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Saturday, June 27th, 2009 AT 8:56 PM
Tiny
92RS_GUY
  • MEMBER
The problem ended up being the fuel pump I had 4 lbs of pressure and you need 9-13. I had a hard time finding it because it was intermittent and my fuel pressure tester was broken and I didnt know it. Good luck replacing the fuel pump, I would replace the fuel filter before the pump tho, its easier and cost $6. And hook up a fuel pressure tester to see what your getting if your car is throttle body you need 9-13 if your car is TPI I think it is the same, but I would double check it may need more.
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Sunday, June 28th, 2009 AT 7:26 AM
Tiny
BLUESKYWALKER
  • MEMBER
Thanks for the information. My son said to tell you thanks, that he had a feeling it might be that. He's going to have it checked out tomorrow and I'll let you know what happens.
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Sunday, June 28th, 2009 AT 5:22 PM
Tiny
BLUESKYWALKER
  • MEMBER
Sorry I hadn't gotten back here sooner, but my son had to wait two weeks before he could change the fuel filter. He didn't want to pay the high price for someone else to do it. So he waited to get to use the garage of a friend and did it himself.

That was the problem. It runs great but he now has something else going on with the fan that cools the engine. He's been doing some work on that but got sick this week and hasn't done much since. I'm sure he can fix that okay. He's a good mechanic, self taught.

Thanks for you help 92rs_ guy, we do appreciate it.
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Friday, July 17th, 2009 AT 8:29 PM

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