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  1. #1
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    2002 camaro ss speedometer

    I had to replace the pcm in my car after I replaced it I let it run for about 10 min to let it re learn. I went for a drive and the speedometer is way off. Going around 50 and speedometer shows I'm going 120. Any ideas?

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  2. #2
    Veteran pajeff02's Avatar
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    '02 WS.6 / '07 Suburban

    Sounds like a simple calibration issue -- A4 or M6? If it's an A4, are you having any shift issues?

  3. #3
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    Quote Originally Posted by pajeff02 View Post
    Sounds like a simple calibration issue -- A4 or M6? If it's an A4, are you having any shift issues?
    When I'm driving I can't get over 62mph the speedometer is showing 155 and just bogs down. Also it doesn't want to shift.

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  4. #4
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    Did u checked the working of your speedometer? Maybe there would be an issue with that

  5. #5
    Veteran pajeff02's Avatar
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    '02 WS.6 / '07 Suburban

    Ok, sounds like you are A4. You should probably stop driving the car until you get this fixed. The transmission has several functions that are dependent upon speed and if it is being fed incorrect data the PCM is probably going a little nuts. You need to scan your tune to see what gearset it thinks it has and then check that against what you actually have. This is simple to do with a handheld or something like HP Tuners.

  6. #6
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/ mods, 00 FBVert

    Jeff is correct, no longer do you need to swap in the correct speedo gear in the transmissions. They all have the same speedo, it's what the ecm is program to take what inputs it gets and then sends a signal to the dash cluster/speedometer needle.

  7. #7
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    Thanks for the input I went ahead and got the pcm tuned and they were able to fix it

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  8. #8
    Veteran pajeff02's Avatar
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    '02 WS.6 / '07 Suburban

    Good to hear.

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