back fire....?
Thread Starter
Joined: Feb 2003
Posts: 3,393
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From: Austin, Tx
back fire....?
I just got a M2 downpipe and I was wondering if it suppost to back fire like crazy. It does back fire loud but you can heard it and sometime when down shifting it does the loud ones.
Thread Starter
Joined: Feb 2003
Posts: 3,393
Likes: 0
From: Austin, Tx
I think I got a chipped ECU but the ECU appears to be stock from the outside but it boosting 12-10-12 constatly like is suppost to do that no boost spikes.
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