Hey everyone. I really don't know how to explain this but will try. There's this noise coming from somewhere, maybe engine I think. It sounds like when you shift too early and the engine rattles until a higher rpm is reached. But I get it when it's at around 2500 rpm. ?? What could it be? Trans or engine? It stops once it's around 3k. Any ideas? Gas octane maybe? Thanks.

sounds like valve ping to me,mine will do this if I run regular fuel,wait until your tank is almost empty and fill it/or half full, with 92-94 octane,I like to spray down the throttle body and clean it up using a good TB cleaner,and spray in some combustion chamber cleaner and then take it for a ride.

Thanks Steve, will try that. BTW what is valve ping? Bad I presume.