Backfiring s4....arrrrrgh!
My monster, out of the blue oneday, started backfiring. The bike has a PCIII w/ a custom map!? I took the bike back to the person who mapped it and he made some adjustments which helped but didn't eliminate the problem. Are there anything else that could cause the bike to backfire other than FI?
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'02 S4 Senna
'03 999s Red
Bimota DB7
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