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Fuel cut and Detonation?

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TSI@14PSI

Probationary Member
8
0
Feb 16, 2003
I searched the threads and couldnt find an answer to my questions. So here i am. My 91 TSI has a fuel cut around 16-17 PSI. Also the engine doesnt like to rev clean over 6k if the boost is over 13 PSI. I am running 93 octane gas. I also have a K+N, MBC, 3" downpipe, 3" exhaust, gutted out cat, and blow off valve. How do i correct the detonation problems and get more boost?
 
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