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OBD I conversion

This is a discussion on OBD I conversion within the LT1 forums, part of the Vehicle Specific category; Ok found out that all along I had an OBD I pcm laying in my garage. My car is a ...

  1. #1
    Senior Member JaycenK's Avatar
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    1997 Camaro Z-28

    OBD I conversion

    Ok found out that all along I had an OBD I pcm laying in my garage. My car is a 97 and OBD II. What do I need to do to convert my car?

  2. #2
    Senior Member 5.0THIS's Avatar
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    95 Z28

    Why would you want to go with the OBD1 PCM? You have plenty of tuning options, and I believe some have gone to the LS1 pcm for even further tunability.

  3. #3
    Senior Member JaycenK's Avatar
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    OK long story short. My tuner decided to stop suporting LT1 cars. Vince at Trifecta. I was shocked. Tuner Cats on OBD I has Datamaster and is a lot cheaper than my options for OBD II or an LS PCM upgrade since I have an OBD I laying in my garage and not being used any time soon. I'm just figuring out all my options here so I can figure out which way to go since I have a tune related issue and now my tuner is not supporting my tune I paid for (no corrections for a small fee). So I would have to go pay full price somewhere else and at that point why not just by the damn software and learn how to do it.

  4. #4
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    Impulse Blue
    2004 GTO

    You have to either change the knock sensor or put a resistor in the PCM. Mine has the resistor, so I can just swap the PCM if I had to.
    Rob
    04 GTO
    96 WS6

  5. #5
    Awesome member Bad Co.'s Avatar
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    1994 Z28

    can you swap from a obd1 to a obd2? And if so what all is involved? i have a 94 z28. My tuner doesnt support obd1 as i went from a ls car to lt recently.

  6. #6
    Senior Member JaycenK's Avatar
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    an LS tuner usually wont touch an obd II LT1 if he dosn't do Obd I lt1's
    But that said you just need to swap the PCM and knock sensor. But with all the programs and free software out there for OBD I why would you? They even have real time tuning software out there for them now.

  7. #7
    Member krese's Avatar
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    1996 Trans AM WS6

    if you state has inspections you will FAIL. if you have a car that came with ODBII you can't go back, you can only go forward. if you are going to do anything then put in a LS pcm. it has been done.

  8. #8
    Senior Member JaycenK's Avatar
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    No inspections hear in FL. I wouldn't pass if they did as it sits right now lol.

  9. #9
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    I don't know about what would have to be changed but it will need setup for speed density tuning.. OBD1 are making a come back as a reliable simpler tunning alternative.. Mostly in the 60* v6 crowds.. There are companies that burn chips and so forth.. I went to speed density stand alone on my TT build project.. Lets me tune from a laptop or hand held in SD.. No MAF either.. Just MAP, knock, IAC, TPS, and MASS, and wide bands is my setup in short..
    Last edited by Smittro; 11-17-2010 at 05:54 PM.
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