So i tried to pull the tune off my car its a 96 btw.. it failed the first few times, but then I got it to download & unlocked the vin..

Well it says its a LM4 5.3l and its a 96... and im really confused, Now it won't read the ECM again.. When i try and scan it with autotap it says it can't find the VIN..

here a pic of what i see, im a newb at tuning so bare with me..

 

Sounds like a communication problem either between the Jet box and PCM or between your laptop and the Jet box. Are you using a USB to serial adapter? I know some people have had issues with those.

 

no just a Serial cable into the laptop.

 

do you have internet off and web browsers closed on the laptop, my jet wouldn't read with these on and also fried 2 pcms because of it also these tuning programs are extremley touchy

 

yes internet off, the laptop is a dedicated tuner.

 

that is strange then is it the same pcm that came with the car?

 

as far as I know, my friend said something like if its a 96 it should save as .bin and 97 should save as a .jsl? well my tune saved as a .jsl..

This computer was tuned before by a jet cable 2 years ago, on a different cable now though.

 

You got it to work again? As I said it could be a 0411 pcm maybe but that tune we pulled was so screwed up everything about it is messed up

 

havn't messed with it much, feel free to contribute any info though.