i recently jus got the pc upgrade then my converter went bad i replaced that and the whole exhaust with high performance exhaust and when i let off the gas it backfires there is no exhaust leak the guy who programmed my pc said it was for a 3.4 pulley and cat back exhaust and cold air intake i only hav dne the exhaust, not the pulley or the cold air intake, does anybody know if this is normal or know whats wrong with it do i need to get the pulley and intake to make it stop backfiring ??? can anybody help ?
