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1991 Chevy Camaro Burning rich, missing

Tiny
MIKERP
  • MEMBER
  • 1991 CHEVROLET CAMARO
  • V8
  • 2WD
  • AUTOMATIC
  • 93,000 MILES
350 eng TPI. The car sits a lot. Started this last time, battery dead, wouldnt charge, replaced battery. It misses really bad after warm up. Smells bad. Done complete tune up. Replaced vaccum hoses that looked dry rotted. Replaced distributer, pick up looked rusted, didn, t help. Cleaned IAC, it was really dirty, no change. Replaced MAP, no change. Timing is moveing from 0 to of timing mark at times. Had Cats checked, the shop said they are open.9/28 sent this question. Rasmataz recommened clean IAC. It was dirty for sure. Computer maybe?
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Saturday, October 9th, 2010 AT 8:07 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
1991 Chevy Camaro Burning rich, missing

Probable causes of an engine running rich are as follows:

1. Excessive fuel pressure can be cause by restricted fuel return line or defective fuel pressure regulator.
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.
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Sunday, October 10th, 2010 AT 3:34 AM

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