So excited to have this tune! That said, I ordered the 'core' model as I live in Canada and didn't want to mess with shipping back and forth. As such, I will be swapping the PCM myself. In doing so, I just wanted to make sure I am doing it correctly. I imagine it is as simple as it seems - disconnect negative battery terminal, unplug PCM connectors, unbolt PCM and then installation is the reverse. Is that correct? Also, is there any sort of 'setup' I have to do for the new PCM? I asked that VATS be disabled as Kelly indicated it was a common failure point anyways - so I don't need to worry about that. I was also told that a CASE relearn is rare on my model year, but if I need to get someone to do it, is there a 'safe' way to do it so my tune isn't overwritten?
PCMofNC Swap - couple questions
- Thread starter Maverickxeo
- Start date
Mooseman
Moderator
You will still need to do the security relearn.
gmtnation.com
If you need a CASE relearn, you'll get a code(s) for it. It doesn't do anything to the tune itself, it just learns the angles of the crank and cam.
huge problem after PCM update / calibration
i go to a local store for programing / tuning to update the pcm / calibrate , many friends done this before and got some good results , enhanced fan clutch , better ac at idle , less overheating due to enhancing the fan clutch response and many other results So the guy who handle the tech2 and...
gmtnation.com
If you need a CASE relearn, you'll get a code(s) for it. It doesn't do anything to the tune itself, it just learns the angles of the crank and cam.
You will still need to do the security relearn.
huge problem after PCM update / calibration
i go to a local store for programing / tuning to update the pcm / calibrate , many friends done this before and got some good results , enhanced fan clutch , better ac at idle , less overheating due to enhancing the fan clutch response and many other results So the guy who handle the tech2 and...
If you need a CASE relearn, you'll get a code(s) for it. It doesn't do anything to the tune itself, it just learns the angles of the crank and cam.
Even with VATS disabled?
Mooseman
Moderator
Ah okay. I thought that was the procedure for VATS. If I need to run my original PCM, I don't have to do it again? Only on new to the vehicle PCMs?
Mooseman
Moderator
If you switch back to the original PCM, you might have to redo the relearn. I don't remember if I had to do that when I switched back to my stock PCM.
So I got the PCM today - and was expecting to need to do the security relearn (set aside an hour) and the thing started up on the first attempt! There is definitely an improvement (however, I will admit, I don't see as large of an improvement as some have said).
I did notice one issue though that I emailed them about - the instant MPG reading stays at 0 - I'm assuming the vehicle needs to run for a while to get an estimation?
Mooseman
Moderator
The improvements on the I6 are usually not as noticeable as on a V8. Maybe better throttle response and better shifts but that's usually about it.
When i put my newly tuned ecm in and started it and drove to town, my mpg readout stayed at 0. i started to panic but after i shut it off and restarted it, then it started working again.
