i just recently purchased a new K&N Filter and installed, and i've only driven it a couple miles, but i was searching the forums, and people have said they are pinging etc, and then they said once they cleaned the MAF it was fine. But they said the MAF was dirty because the Pro-Oiled K&N Filters oil got into the MAF and messed it up. Any experiences anybody, and any precautions i can take against this before i drive it any more?