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2008 Mazda MAZDASPEED3 Question: number 4 cylinder miss fire!

 

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Visitor, Clovis, NM, March 24, 2010, 09:35

I keep getting a number 4 cylinder miss fire. I have changed the plugs and switched the coils. I still get the same problem, also I've noticed that there is oil on the number 4 cylinder spark plug treads, is this bad? I just had this motor rebuilt last year with forged internals, please help.

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  • Answer #1

    March 24, 2010, 11:19
     Enthusiast

    sounds like a valve cover gasket is needed along with a boot , and the treads mean its misfiring.

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