snap crackle pop backfire
January 12th, 2010, 4:12 PM
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snap crackle pop backfire
got a 1992 k1500, 7.4l 700r4, 5.7l ecm.. 454 tbi unit runs great, idles great, no vacuum leaks, but it pops and backfires at wot
running a heated o2 sensor, edelbrock shorty headers and downpipe 3" flowmaster exhaust has MSD blaster coil, 8mm wires, high end acdelco plugs, running a 45 series instead of 43. can't seem to get rid of it
running a heated o2 sensor, edelbrock shorty headers and downpipe 3" flowmaster exhaust has MSD blaster coil, 8mm wires, high end acdelco plugs, running a 45 series instead of 43. can't seem to get rid of it
January 14th, 2010, 6:24 AM
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it still does it even with the 7.4l computer that came out of the 454ss pickup, and bigger injectors and stronger fuel pump don't sound like a solution to keep the engine from being modified. anything i can do without going to aftermarket stuff?
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