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Thread: LT1 OBD1 & OBD2 PCM's

  1. #1
    Fuel Injected! Terminal_Crazy's Avatar
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    LT1 OBD1 & OBD2 PCM's

    Hi guys
    just had a conversation with another member re a spare PCM

    I've just ordered a '95 Z28 PCM of Ebay 90.00 USD which arrived today.

    What I may have been using is a socketed '97 which would have been OBD2 ?
    OK the vin on it decoded to a '97

    Is there any issues with reflashing a '97 ?

    I seem to recall built OBD2 cars using earlier OBD1 PCM's because of a lack of tuning software
    and also i recall the Knock sensors are different since I'm using '95 based parts.

    Thanks
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  2. #2
    Fuel Injected!
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    Quote Originally Posted by Terminal_Crazy View Post
    What I may have been using is a socketed '97 which would have been OBD2 ?
    OK the vin on it decoded to a '97
    Mitch

    No chance.

    Someone programmed the 97 vin for inspection or some other means. You can change it to whatever you want.

    96-97 use different memory chip on t-side.
    96-97 use vpw ob2 for communication.
    94-95 use ALDL obd1 for communication.
    There is no way to flash it with ALDL cable if it is 96-97 pcm. DO you have the p/n.

  3. #3
    Fuel Injected! Terminal_Crazy's Avatar
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    Hi
    Cool. That clears that up.
    I need to pull it out of the car and see what its marked as.
    That was the vin on it when i got it.
    I new they were different.

    Cheers
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

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