Hmm ok, As long as you are sure that the ignition is getting ignition to the ecm. when key turned on, all pink wires on the harness and going to the computer should be getting 12V, and the orange wire should be getting 12v. If thats the case, then a replacement might then be needed. Pretty rare..

 

Cal. I'll get with you after the holidays in January. Gotta make sure the kids and GF have a good Christmas and new years.

 

I've been trying to follow wires to check that. That's why I replaces the key switch also because it had the wire casing cracked and had exposed the wire.

 

I have a 98 camaro with 350 ls1 it roles over but it want start You can get it to start by resetting the ecm/battery & ecm /ignition fuses

 

New fuses and relays did not work on mine. That's what I checked and replaced first.