If you want I can attempt a repair on your PCM and save you a few bucks. If I can't fix it I can get you a GM reman unit for around $150 and shipping. That would include a reflash with a GM calibration or your custom calibration.
I charge $75 plus return shipping. Here is what I have to do. Disasebmble your PCM, desolder the flash memory chips (there are 2) clean up the PCB solder pads, reflash the chips, solder in sockets for the chips, reassemble, flash program and test the PCM for communications. All in all it takes me about 2 hours to do this.
If you want to do it, email me off list and I will provide a shipping address. If you have a file that you want me to flash the PCM with email that as well.
TJ,
when you say solder in sockets for the chips, does this mean i you fry a chip for the pcm while falshing it you can simply reinsert a new chip and reflash it? I have heard of socketing to do something like this.. just wondering if this is what i read about.
also, sorry to hijack your thread but im getting slaughtered by my 95 M6.. need some help. I will post that as a new thread though.. please take a look if ya don't mind!
Yes, basically its what some refer to as socketing the PCM. One has to de-solder the chips, install sockets for the chips to go back into or as another option re-solder the chips back in. Some prefer socketing as this allows the removal of the flash chips in case of another programming error. Otherwise it really is a PITA to de-solder the chips again, and thus risk PCB (printed circuit board) damage. That is why I generally install sockets so that the chips can be removed again if necessary.
When I reflash a chip in case of a PCM repair, I have to flash program each chip separately. When a PCM reflash takes place either by you using Tuner Cat or LT1 Edit or if a dealer does it, what happens is this......
Flash Chip E reased, then T is erased, E is programmed then T is programmed. I may has it backwards, but that is what happens when a end user flash dumps a new program into a PCM. And when that sequence gets disturbed either the chips get erased and don't get reprogrammed, or they get erased and the programming sequence isn't completed. Either way is bad and either way will result in a dead PCM.
roger that.. i may send ya some PCM's to solder in some sockets. do you have any idea how to check and see if injector drivers are functioning correctly? i was told this may be my issue if the exhaust leaks don't fix my solution. also, do you use tunercat or LT1 edit? i think the tunercat software is much cheaper.. is it as easy to use and is it as capable as lt1edit? i have cables here for both obd1 and obdII cars from AKMcables and one from alex pepper. i need to program! getting the itch!
Its pretty hard to check them unless the problem is acting up at the time. I would definitely be checking on the O2 voltages like I had mentioned earlier in a previous post. While an exhaust leak would a cause a problem such as yours, it would do it all the time if the leak was there especially when cold when a leak is more prevalent. Double check the O2 sensor voltages when and if you can catch it when its acting up.
Corvette Store
Good source for PCM?
