Question about 1999 Chevrolet Malibu

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1999 Chevy Malibu 2.4 DOHC. Serious drivability issue. Dead miss, no codes. Sputters at idle, dies while driving. I have replaced both coils, coolant temp sensor, cleaned the injectors, cleaned and re-gapped the spark plugs, i've also cleaned the throttle body and fuel rails. Problem has gotten alot better but still isn't driveable. HELP PLEASE!!!!!

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Have you changed the fuel filter? i would try that. failing that, i would have a back pressure test performed on the catalytic converter. sounds like it could be plugged. good luck!

Posted on Jun 01, 2010

  • Jonathan Hardin
    Jonathan Hardin Jun 01, 2010

    The fuel pressure is great at the rail and the filter. I would imagine that if the converter was clogged the higher the rpm the more problems it would have. This is doing the opposite, the higher the rpm the less of a problem it is. Not sayin your wrong just wonderin what are the odds of the timing?

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