Car still running poorly

Asked by Jun 21, 2016 at 12:51 AM about the 2003 Chevrolet Cavalier

Question type: Maintenance & Repair

I have a 2003 Chevy cavalier . My car runs
but not like it should. Got the check engine
light checked out and they said its a spark
plug . So I put new ones in. Still I have the
same problem . Got the check engine light
looked at again and they said its a fuel
injector. That it was misfireing my third
cylinder . I took them out and got them
cleaned out all of them spray good. And
still have the same problem . Don't know
what else to look for

1 Answer

51,585

P0303 CHEVROLET - Cylinder 3 Misfire Detected- Possible causes - Faulty spark plug 3 - Faulty spark plug wire 3 - Clogged or faulty fuel injector 3 - Faulty ignition coil 3 - Fuel injector 3 harness is open or shorted - Fuel injector 3 circuit poor electrical connection - Ignition coil 3 harness is open or shorted - Ignition coil 3 circuit poor electrical connection - Insufficient cylinder 3 compression - Incorrect fuel pressure - Intake air leak

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