txturbogs

My tuner told me that the PCM is locked and he cannot tune the car past minor things like a few degrees of timing and a few points of AF ratio.

He said that the previous owner or tuner locked it for some reason. He uses EFIlive to tune. Can it be unlocked??

Ryne @ CMS

iTrader: (10)

if the pcm is indeed locked, i dont see how he is even able to adjust the timing or air-fuel ratio

txturbogs

Hmmmm, so yes, it can get locked? Basically, he said it is useless for our application since we did a H/C/intake, etc.

Frost

iTrader: (45)

Sounds like he is kinda confused. If it is locked, he can't tune *ANY* parameter, he can't even *VIEW* them.

06MonteSS

yeah... like the others said.. if it's indeed locked, then he would not be able to do ANYTHING...

so, if he IS able to adjust the timing, or do ANYTHING at all, then your PCM is NOT locked...

Ben Diss

iTrader: (1)

Option 1: Pull the PCM and send it to the locking tuner to be unlocked.

Option 2: Buy a new PCM and flash the latest GM OS onto it.


That's it. Nothing more, nothing less. You're screwed.

slow

iTrader: (7)

There are other options, pull pcm, unsolder flash chip, read file, resolder flash chip back to board, find
seed/key, use efilive to unlock pcm, and then tune

But the above options are much easier

Ryan

txturbogs

LOL, thanks for the advice. I ended up buying a used one. Thanks

wait4me

iTrader: (10)

Weird that he wouldnt be able to change ALL the tables.. A locked ecm makes it so you cant modify ANYTHING at all. It wont let you read or write to it.