Not Ranked
I think a header/collector leak you cannot hear but can feel could cause some popping on deccel. A leak you can hear ticking can cause some more frequent and louder popping and may approach simulated backfire . I have had flames but only after a fairly good exhaust leak has been located yet....the motor runs great....only POW ! When I let up. If you are shooting flames are you backfiring loudly ? How does the motor run on the accel ?
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