RepairPal is your advocate for car care advice and guidance

Q: number 4 cylinder miss fire! on 2008 Mazda MAZDASPEED3

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.
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
sounds like a valve cover gasket is needed along with a boot , and the treads mean its misfiring.
Didn't find what you were looking for?