Question about 1999 Plymouth Neon

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Ok I just changed the valve cover gasket and I changed all the spark plugs and wires but it is still misfiring. Why?

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Have you taken the distibutor cap off ? if not, take it off and check for spider like tracks from the centre electrode to the other terminals, also check rotor arm for signs of melting, cracks etc.

Posted on Oct 08, 2010

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SOURCE: Valve Cover Gasket

the oil was the cause of the misfire, the oil swells the rubber on the plug boots and interferes with the electrical connection from the wire to the plug. when you replace the gasket, remover the plug wires, marking which one went where, and use a spray electrical cleaner to remove the oil. make sure the rubber on the new wires isn't already swelled. before removing the plugs or valve cover, spray brake cleaner down in the holes and use compressed air or shop rags to get the hole shiny clean before removing plugs. remove plugs and clean them too. then reinstall plugs and remove valve cover. when replacing any gasket, use a razor blade on to clean the surfaces well. you can even spray a shop rag with brake clean and wipe it to make sure its clean. clean is important. reinstall cover with new gasket in place and torque bolts... be careful not to overdo it, they are small bolts and overtightening can flatten out gasket and cause more leaks. then just reinstall plug wires and off you go

Posted on Feb 20, 2010

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