MISFIRING ON STARTUP

  • Tiny
  • laure123
  • 1996 Chevrolet Corsica
  • 250,000 miles

1996 chevy corsica misfires on start up and idle but runs fine at higher speed
i have done a complete tune up and replaced egr valve. Nothing helps, engine code says misfire cylinder 3. All tests show #3 running fine. Only have misfiring on start up and a very crappy idle

Sunday, September 18th, 2011 AT 10:31 PM

1 Answer

  • Tiny
  • promechanic
  • Expert
  • 551 posts

I would check compression next. Let me know what it is and I can help you more.
If the compression is low it can cause a misfire.

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Sunday, September 18th, 2011 AT 10:48 PM

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