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| 2008 Mazda SPEED3 |
I keep getting a number 4 cylinder miss fire on my 2008 Mazda MAZDASPEED3. 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.
Answer: Sounds like a valve cover gasket is needed along with a boot , and the treads mean its misfiring.
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