Ok Guys and gals lets dig in. The MAIN reason I got HPT for the shop truck was to play with the TCM. Some of you may remember me fromt he old LT1 days digging in the transmission long before any one else.
This brings me to my biggest problem so far. I can NOT get reliable communications with the TCM. It is hit and miss and with HPT if you do not get a good connection with the TCM you do not get a read at all.
When I was playing a few weeks ago I actually took the TCM out of the truck and made sure all was was. While I was at it I made a few tunes for just in case. Well tonight tunes out to be that case. After an hour of freezing my ass off in 20* weather to put my tune back in I gave up and pulled the TCM fuse and uploaded one of my other tunes.
RPITFA!
I am just glad I was prepared. The ONLY thing that changed was i had the truck at the dealer for new injectors (anyone with a LB7 can relate). No programming was done at the dealer BUT I had pulled all mine out. All I wanted was to upload the tune I was running before.
So I DID take a few note. I also noticed that a few times HPT also could not find the truck and if i switched off "high speed"i it would not find the MPVI Pro. Other then that it always failed on the TCM. For a while it kept failing at "loc: 0" and then eventually moved up to "loc: 64800" and "loc: 68c00"
Like I said I never did get a good read on the TCM. If I am not getting a good read there is no way in hell I am trying to program.
Maybe we could add a switch to not read/program the TCM?
How is every one else doing?