2002 Chevy Impala Hesitates While Driving

120,000 MILES • 6 CYL • 2WD • AUTOMATIC
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TODOMAR
  • MEMBER
  • 1 POST
The diagnostic code was P0300. Auto parts said to start of with the spark plugs. So I changed it and it did the same thing . I took it to a mechanic and he said that it might be the crankshaft. When he changed it, it did the same thing. Mechanic said that he checked the fuel flow and it was good. Air filter and fuel filter were good too.
After the auto parts said change out the spark plugs and still doing the same thing change out the spark plug cables. I told that to the mechanic and when he changed out the cables it was running for a couple minutes and the car shut off on its own and it through off the mechanic. now code P0404 came out and I changed out the EGR and still doing the same thing... Some mechanic said it may be the Catalyst Converter... What may be the problem after that?
Apr 16, 2009 at 4:54 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
If the converter is plugged, it could be that. Also, have the ignition module tested.
May 4, 2009 at 5:21 AM
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