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1987 Chevy Camaro rough idle

Tiny
TNIOP
  • MEMBER
  • 1987 CHEVROLET CAMARO
  • V8
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
The engine runs smooth when cold and the choke is partially closed but after it has warmed up it runs rough. It does not quit under a load, i.E. In drive but not rolling. But has very rough idle. Recent tune up and all good vac lines. Rebuild 2 years ago with no issues up until now. No trouble lights or check engine lights are on. Is this possible valve adjustment?
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Wednesday, May 27th, 2009 AT 4:08 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Does the engine have a carb or injection? I had an 86 with multi port injection.

LEt me know so I can better help.

Joe
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Friday, July 3rd, 2009 AT 7:50 PM
Tiny
LOUT5369
  • MECHANIC
  • 217 POSTS
Put a vacuum gage on it, see what reading you have, should be steady 17-22hg, you could have intake leak.
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Wednesday, July 22nd, 2009 AT 11:29 AM
Tiny
JHUERTA22
  • MEMBER
  • 15 POSTS
Have you checked the ohm readouts on the fuel injectors. That was what caused my rough idle.
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Monday, September 7th, 2009 AT 9:43 PM
Tiny
LOUT5369
  • MECHANIC
  • 217 POSTS
Well, due to the fact you have a choke, I think we can rule out injectors. I would put a scanner on it and check the MAP sensor readout, TPS readout, I have had the vacuum hose for the MAP sensor collapse internally causing the map sensor to make the cars mixture not change(run rich or lean)
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Tuesday, September 8th, 2009 AT 6:46 AM

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