white1

iTrader: (5)

I was under the impression that once a PCM learned the crank it was done. I pulled mine to get a update, and the stock PCM threw a code ( I havent checked it yet though) Will I have to do another relearn when I put the tuned PCM back in, or will it still recognize it?

If I need another relearn is there anyone around South La that has access to a tech 1 or 2?

thunder550

iTrader: (70)

I think any time the crank position does not match what is stored in the PCM you have to do a relearn. This means that any time you swap a PCM it has to be done again.

02chevyracing

iTrader: (1)

but it is only when you install a core tuned pcm right? if you get your stock pcm tuned then there is nothing to worry about right?

JERRY2500

It can also be done with HPTuner

white1

iTrader: (5)

Jerry, you mind fixin me up one day?

white1

iTrader: (5)

Thats the thing. I had a crank re learn on my tuned PCM done, and when I puit the factory one back in, it threw the code. Im wondering if I will need a re learn again when the tuned PCM goes back in.

thunder550

iTrader: (70)

If you take out your stock PCM and send it in, then plug it back in again without moving the truck you should be fine.

white1

iTrader: (5)

Thats what I was looking for. So since I moved the truck, I guess I'm screwed?

fox_forma

from what i understand, once your PCm is learned for the crank position it doesnt matter if you take it out ands swap with another one. Once that one is put back in it should not throw any codes or anything. make sure you didnt overtighten the bolts for the PCM as well, i have heard of overtightening can cause some issues. Get the code read first and see where you stand. Good Luck

JERRY2500

Sure can, I don't know if i'm going to NPR Wednesday or Fridy. More likely friday. I'll let you know.