Close

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

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
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.
(1) Answer