Dylan1995TA

Hi everyone so i did a 5.3 turbo 4l80e swap into my 1995 Trans Am. The engine was running and would fire on the stand before we put it in the car now we can get it to fire. Ive tried a multitude of different tunes even the one when it was on the stand still nothing. Its not giving spark anywhere even though the coils have power (we tested with a multimeter) im at a loss now we have been using hp tuners and tried 4 seperate pcms now. The set up is a 2002 5.3 with a 1998 fbody harness repined for 99 and up i have 3 different computers to try them being 2000, 2003, and a 2004 from a truck and one from an express van. Im at the end of my knowlegde and dont know what to do. Thanks

truckdoug

iTrader: (25)

my experience with loss of spark usually finds a bad ground.

if the coils have ground and power in key on, check the signal to the coil with a VOM set on DC low voltage.