This is what I have so far. Truck has been thru a lot lately, but I'll spare the details for now. What I have is a 355 SBC with LT1 roller cam, 90lb @13psi injectors, 454 TBI, early 80's Z28 Fbody 4bbl intake, Z28 exhaust manifolds, Dart sportsman II heads, 1.6 roller rockers, and 747 TBI. Looking for advice with my code, this is a street/offroad truck. It is an '89 S10 blazer 4x4 with 700R4, NP231 Tcase, 3.73 axles, sitting on 31"s right now. After doing a few rough tunes and fixing a few things I can't figure out why it is backfiring thru the intake when making rapid throttle increases. I have attached a short log as well as my bin, I started with AKAJ code as it was what I had available that seemed closest. Any and all input is welcomed. I am also curious as to why in tunerpro the 'spark advance from hack' seems to act as a counter between 0 -100. I am pretty concerned seeing advance above 50 and up to 100.
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