2004 silverado 4.3 to 5.3 swap. constant 12v to coils and fi no signal to coil packs
hello,
this is a NO START issue... i am new to hptuners but fairly proficient at tuning and the concepts involved. i did a 5.3 swap into a 2004 silverado that ran and drove but only had a 4.3 in it. i reused most of the 4.3 harness and just repinned certian sensors. i have 12v constant to ckp, cmp, and pcm. i have 12v constant to ignition coils pink wires. and i have good grounds at ignition coils black and brown wires. but no signal to the coils from the pcm. and i have verified the fuel pump comes on for 2seconds when key is cycled so i know the ckp and cmp are working as well.... it has to be something simple. is it a bad pcm? or something else? any help is appreciated. thank you for your time. mike in oklahoma