Finally swapped in the l29 got the motor running and driving idles by itself but motor has a heavy misfire.
Truck is a 96 harness 96 from the old 5.7 modified for the l29 ecm is 98 with the 4l80 repinning runs thru all gears fine, when I pull out plug wire #1 & #8 no change in idle or revved above 1000rpm. Checked injectors and any air or vacuum leaks, redid timing about 5 times. Can’t figure it out
Truck is a 96 harness 96 from the old 5.7 modified for the l29 ecm is 98 with the 4l80 repinning runs thru all gears fine, when I pull out plug wire #1 & #8 no change in idle or revved above 1000rpm. Checked injectors and any air or vacuum leaks, redid timing about 5 times. Can’t figure it out