Did you hear pinging above 4000 rpm?
Did you hear pinging above 4000 rpm?
2001 ECSB 4x4, 5.3, Radix, 3.0 pulley, VHP Trucker cam, 216/224 .551/.551 115 lsa, 1.8 Crane roller rockers, 4L65E, Yank SC3000, 3.73, Cal-Tracs, HPTuners.
Yeah heard pinging, I always run 93 octane and also the lucas fuel treatment in every tank, I just got new plugs, wires, and a fuel filter hopefully it isnt a coil pack there pretty pricey. I appreciate all your help, hope it works Thanks
While you are doing your maintenance tune up, swap the #3 coil with the #1 coil. If it happens again after the tune up, and the miss moved to #1, then it is a bad coil. If it does not move, and is still #3, check your catalytic converter for backpressure. Anything more than 1 PSI at 3000 RPM will cause this also.
Alright i changed plugs, wires, and switched the coils and it has the misfire on # 3 cylinder still. How do you check the back pressure? Or what else could it be?
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