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How do you pinpoint a p0300 a po303 and a p0306 code on a 97 intrepid 3.5 that i have already replaced the wires plugs and the coil pack all connections look good but misfires bad at idle and driving?
Wiki User
∙ 12y ago
From experience, we have replaced all of the listed items above also the plenum gasket and cleaned the upper intake. No change. Most recently while changing an injector we decided to remove the fuel rail and found that the fuel rail was rusted and clogged causing the misfire codes. After replacing both fuel rails the idle was normal and the only issue now is an EGR code, which we are having trouble diagnosing.
I have seen failed lower intake gaskets do that.
Wiki User
∙ 12y ago
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