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View Full Version : Back firing. Spark issue?


c_mancuyas8
12-22-2011, 01:13 AM
Ive been doing some searching but answers are all somewhat vague. I believe I keep fouling my plugs and Im having trouble pin pointing why. My tune I got from enthalpy was rich so I leaned it up with the safc. In full throttle im at afr 10.9-11.5 and cruising im low 14's idle about 15. My plugs are gapped at 28 and are only about 2 months old so Im kinda stumped. When I first got the tune on new plugs it ran excellent now im backfiring in between gears unless I change gears after wot. It also sounds like I might be backfiring in high rpm. (5k+ blastpipes make it little hard to distinguish) My setup is basic ka-t, blow through n62, 370cc, t25 Thanks in advance for any help provided. Sorry so long.