Originally Posted by Showmyrtdakota
From my experience with the problem you are having is the computer because it is getting hot and shutting off then starts working again after cooling the only other case i had where it had said no bus was when a distributor was bad but the truck wouldnt start at all an only said no bus when running the codes with the key
I am almost quite sure it is a bad pcm. I have been doing a lot of research on this particular forum on the "No Bus" complaint and all the symptoms point to the a bad pcm. I have been driving it for days now and no problems with it dying until yesterday. I knew it was bound to die at some point or another but I was just waiting to see when it would finally die on me. Ambient temperature here the last few days have been around 95-97 so I knew I would be able to confirm a bad pcm if it in fact is shutting down when it gets hot. So, after it died I pulled over to the shoulder and turned on my ignition. Sure enough "No Bus" on the odometer. I shut it off and gave it about two minutes to let it cool down or let it do whatever magic it does in there. After waiting briefly I turned on my ignition and all the gauges started working with "No Bus" diminishing. Sure enough I cranked it and it started. I had been driving it for some time yesterday when it died on me - ambient temp at 95 and engine compartment at who knows. The fact that it does this ONLY when it's hot leads me to believe it's a faulty pcm. If it was a sensor, I think it would do it more often than it actually does it.
Prior to it dying on me I had checked a few ground locations and repaired the negative battery cable that was chaffed. All my grounds look pretty good with no rust, dirt, or any defects that would consider them to be repaired. I know there is still a few ground locations out there somewhere I just didn't get to them but will locate them when I have a chance. I also disconnected all three harnesses to the pcm and checked the connectors and pins, male and female side. Everything looks in good shape.
what do you mean 3 or 4 rolls? There is one long ass ground from battery to alternator, probably 3.5 FT if i had to guess..
Yea, the negative battery cable going right below the A/C comprssor. That one was about like you said, 3.5 feet long. it was so long that it was rolled into 3 rolls and zip tied to other wire looms to keep it from rubbing on the block. Anyway, I took that off and bought a new negative battery cable and threw that one. Works perfect, no sense in having it that long and having it rub on all the other shit in there.
So with all that said and done, does anyone know where to get a pcm from a reliable supplier?