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1997 Chevy Camaro Camaro misses with ruff idle.

Tiny
TODD27
  • MEMBER
  • 1997 CHEVROLET CAMARO
  • V8
  • 2WD
  • AUTOMATIC
  • 112,000 MILES
It runs perfect in the morning when I first start it. Till it warms up. Then it miss fires at 18rpm to 25rpm. Then it smooths out if u accelarate but it still has a ruff idle.

ive change egr valve. I tried running it without egr valve. I put a new fuel pump. Distrubuter cap. Spark plugs.
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Tuesday, September 21st, 2010 AT 2:48 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Maybe there is a vacuum leak, somewhere? Also, Check for applicable trouble codes. At the least you need an obd2 code reader. You might try a cylinder balance test, at idle. Kill the cylinder/s one at a time for only a second or two, to see if there is any effect on the idle. The cylinder you kill that has the least effect on the idle, is either dead or weak. Then you have to decide is it fuel--spark--compression or other?
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Tuesday, September 21st, 2010 AT 3:04 PM

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