I have a kenne bell 2.6 on my cobra with a issue that my tuner came up with but I'm starting to think something else. He did a compression test on my motor and got to cylinder 4 and said it was oil. I am thinking it's coolant on top of the piston. I had someone stand behind my car and it was a whitish smoke coming out of the pipes. I can almost smell something like coolant in my car what could this be thanks