1999 Pontiac Sunfire Misfiring

Tiny
MAHIRKAL
  • MEMBER
  • 1999 PONTIAC SUNFIRE
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 156,095 MILES
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?
Monday, April 6th, 2009 AT 3:55 AM

1 Reply

Tiny
SERVICE WRITER
  • MECHANIC
  • 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.
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Monday, April 6th, 2009 AT 4:51 AM

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