I wanted to see if there any others expericing engine detonation. I have an '01 gt w/45k miles on it with pulley's,cat back,x-pipe,CAI and T-body. The engnine has been detonating once it gets up to operating temp and when I am on the freeway running around 75-85 mph. When I hit the gas it starts pinging. What can I do to keep it from pinging?