Ive done all the standard upgrades... Injen Cold Air, 1320 V2 Header, 1320 V2 Exhaust with extra quiet baffle and DDM fuel rail... I plan on having the MEFI tune done as well. My question is, as soon as I installed the V2 Exhaust, I started having backfiring on the decel... with the extra quiet baffle its less noticeable, but its still there... it almost sounds like a spring or something rattling around, but pretty sure its backfiring cause the second I give it gas again, it stops the sound. Anyone have something similar and resolve the issue with the MEFI tune? Anything I can do to remedy the situation myself? Also, my check engine light comes on every now and then shooting out a 65565 O2 code which suggest a fuel mixture issue which is right on point with the back firing... THANKS GUYS!
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