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Power Strokes
7.3 Aftermarket
PCM swap and I am still stumped Grrr!!
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[QUOTE="TARM, post: 1014020, member: 578"] V-ref, Always tempting my darker side. LOL Joe, WB others, As I have the PATs unplugged I had thought that killed the security light and the keys needing to be programed. I thought that was all a part of PATs. Now I went back and reviewed my post which was actually a full year ago where this all started. I got the symptoms some what wrong that happened. The first PCM where it locked PATS the pump would not come on just as it is now. When I tried the other X PCM of a friend same family year etc the pumps would come on and not shut off but in both cases it would not start. The latter I was told in the thread was because the GEM PATS PCM were not sync'd ( same code or something to that effect). Here is the link as I think it may help if some of you would read it. [url]http://powerstrokearmy.com/forums/showthread.php?t=34982[/url] My first thought right off the bat is maybe something to do with the TS chip and its programs. If something was wrong with a chip that is freshly installed onto a PCM when you key on it the pumps would possibly still kick on as tests etc have not run yet but then as you either turned to crank or rekey cycled it would now create the dead issue. I have time right now to go out for the rest of day to work on this. I am first going to pull the chip and also pull the grounds off the batteries to clear the PCM. Then try it without the chip installed. Now looking at what everyone that has done this swap has posted you all have kept your PATS plugged in. Maybe this is some how needed?? What about what WB asked about the keys being programmed is that part of PATS or the GEM/PCM etc? If I plug it in do the keys need to be sync'd even if the PCM is not PATs??? If it is then I should for sure have to resync the keys because of everything I tried the first time last year. I then had tried resync the keys and as it failed they are likley no longer sync'd. IIRC this is the resync procedure: Turn the key to on where all the lights are on. Waited for the fast flashing to go to a slow flash ( about a minute) Turn the key off and take it out and at least 2 ft away ( out of the cab) for 30-40 seconds. Put it back in and turned to on. The SD harness just came in. I am not sure if I should swap that out right now in case it has something to do with it or would I just being adding in new variables of a untested wiring harness etc? Going thru what Joe and WB have both stated the only common thing is they both have the PATS plugged in. WB is running a X wiring harness and still plugged in GPCM. The only thing changed was the PCM. PATS still plugged in. Joe is running a SD harness with a GPR and SD PCM PATS plugged in. So all I can see is PATS plugged in. All I can think of as the SD PCM should have no way of knowing anything about the PAT is maybe the GEM and PATs talk to each other?? That of course is if this is even the issue. [/QUOTE]
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PCM swap and I am still stumped Grrr!!
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