Project Mr. Green Jeans (now 5.3 LS turbo build!)

[rajincajintj]

Originally Posted by bnoon

Yeah, it comes up with stars and punctuation marks on the forums.

I went through pin by pin and found ground where there were supposed to be grounds and power where there was supposed to be power, nothing out of place. The only thing I was seeing that was questionable was about a 1 volt difference from keyed ignition power vs. power direct from the battery through the junction block, so I'm thinking that the 1 volt difference may be back feeding through the PCM somehow and killing it. I'm going to move all other keyed ignition powered items off to their own feed, power the ignition feed to the PCM through a relay to get full battery power, and upgrade the grounds to the frame and body and bring them all to one point to eliminate any voltage differences.

sounds like the "non-running" state is OK. how much running time do you get before the PCM dies? do you have enough time to make the same ground and voltage checks while its running?