1999 Pontiac Sunfire Misfiring

1999 PONTIAC SUNFIRE
156,095 MILES • 4 CYL • 2WD • AUTOMATIC
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MAHIRKAL
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  • 1 POST
My car is misfiring. I thought possibly it as the plugs, but my dad listened to it, and he says its to continuous of a sound to possibly be the plugs. He said it may be the fuel injector system. But I recently had the fuel injector system cleaned. Any other possibilities or solutions?
Apr 6, 2009 at 3:55 AM
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SERVICE WRITER
  • CAR REPAIR CONTRIBUTOR
  • 9,123 POSTS
It might help to have the computer scanned for codes. If there is a misfire it should show which cylinders are the problem.

You can verify spark using a spark tester. May want to check fuel pressure to see if it is high, or low.
Apr 6, 2009 at 4:51 AM
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