Noo it was doing this before the tune, not the cam. But anyway I had a good mechanic friend listen to it and he said it sounds like timing, so apart it came.
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1994 Z28 A4, Magnaflow, TTII'S, CC503, 1.6' RR, MadZ Tune, Pacesetter Lt's, 3'' ORY, K&N CAI, Free Mods, Nitto Dr's.
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