Well today I went and pulled my car in the garage after getting some gas and put it in park and attempted to rev it up a little bit. When a barely tapped on the gas right after i put it in park there was a very low pitched pop sound. I reved it up after that and everything seemed fine. Im jus guessing i gave it gas at a wierd moment and it skipped timing a little bit? Can anyone else give me another explanation? thanks for all the relpys.