i put the perf. file 1 and the shift firmness at 1. at 4k rpms, i hear a knocking from the motor. is there a way that i can get this to go away as it is annoying?
Stop putting the car into detonation immediately! First, make sure you are running a high quality premium fuel. If you are now, then you aren't going to be able to run that tune. You might need to get a custom tune from someone like Torrie and have them work with you.
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