Question about 2004 Jeep Grand Cherokee

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After fueling a half tank after fuel light came on, jeep began running rough and skipping. Engine light came on and was flashing as I drove. filled up with premium gas and added Lucas to tank and Heet. Still running rough after coil pack and spark plug changed. Also put on throttle position sensor what else could be the problem? The following misfire codes appear PO306, PO300 and PO302.

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A stuck purge control solinoid valve raw fuel is being drawn into the intake manifold, this will set a misfire code

Posted on Oct 08, 2009

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U might have a bad batch of gas have seen this many times. take a fuel sample check for contamination like water or dirt particals or diesel. Diesel will burn very slow and will emit black smoke. gas burns very rapidly and will never leave a dry spot try this first and see what u come up with.

Posted on Oct 07, 2009

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