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Tach goes crazy since Hondata

Discussion in 'ECU's, Electronics, and Tuning' started by integraslut78, Jan 8, 2005.

  1. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    So I just recently got a Hondata and when I floor my accellerator my tach starts jumping everywhere it starts right around 4500-5000 and then it bounces to 0 and then goes all the way around. I took it to a Tachometer specialist and he was baffled. Does anyone have any ideas what the deal is? All I know is that I do not want one of those 4" tachs with the shift light I want to keep my stock stuff.
    Do you guys think it may be something with the ECU? I thought it was my spark plug wires but that was not it. Any ideas? Any help is much appreciated. Thanks in advance.
     
  2. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    It almost seems that the rpms are going too fast for the tach which is obviously not true since my car is slower than hell. Thought this may give a better description of whats going on.
     
  3. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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  4. BigJ

    BigJ I'm just about that action Boss. VIP

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    Bad Ground. I semi-have this problem. Or did, I fixed the ground, and everything's dandy.
     
  5. hcivic.com

    hcivic.com Senior Member

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  6. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    Thanks bro I will check that out.
     
  7. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    Hondata will just tell me to call one of their resellers.
     
  8. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    Any other ideas if its not the ground?
     
  9. formby

    formby learning in progress

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    is it a good tach...(not a cheap knockoff?).....it might be the wiring .....
     
  10. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    It is my stock tach in my dash.
     
  11. pissedoffsol

    pissedoffsol RETIRED

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    tbone had the same problem. its breaking up- not enough to feel it, but enough to see it. check your ignitor.
     
  12. AllMotorMonster

    AllMotorMonster Senior Member

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    I know exactly what this could be...

    Check 3 things.

    1- Ground at the thermostat, make sure there is no corrosion. Also check all the other grounds on the engine/tranny. Look for corroded wiring or loose bolts/nuts

    Check and see if this fixes the tach.... if not continue to #2

    2- Take your gauge cluster out, tighten ALL the screws down on the back of the cluster. RE-install the wire harness, making SURE it is secure.

    Check and see if this fixes the tach.... if not continue to #3

    3- Find the TACH input to the ECU, make sure the connection is GOOD and not broken/corroded.

    This should fix your problem.
     
  13. integraslut78

    integraslut78 Stylus DJ Extraordinaire

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    Thanks guys if it ever stops raining here in SoCal I am on it. No garage.
     
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