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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Jet tuning problem..

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Old Jun 15, 2012 | 09:01 PM
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Default Jet tuning problem..
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..

Jet tuning problem..-lpuef.jpg
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Old Jun 15, 2012 | 09:27 PM
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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.
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Old Jun 15, 2012 | 09:45 PM
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no just a Serial cable into the laptop.
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Old Jun 15, 2012 | 10:43 PM
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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
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Old Jun 15, 2012 | 10:46 PM
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yes internet off, the laptop is a dedicated tuner.
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Old Jun 15, 2012 | 11:42 PM
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that is strange then is it the same pcm that came with the car?
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Old Jun 15, 2012 | 11:55 PM
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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.
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Old Jun 16, 2012 | 01:05 AM
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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
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Old Jun 16, 2012 | 02:10 AM
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havn't messed with it much, feel free to contribute any info though.
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