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tachometer not working

This is a discussion on tachometer not working within the General Help forums, part of the LSx Technical Help Section category; I just installed pacesetter headers and work great but today the tachometer needle stays down only when I rev it ...

  1. #1
    The Silver Bullet LS1_ws6's Avatar
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    tachometer not working

    I just installed pacesetter headers and work great but today the tachometer needle stays down only when I rev it up to 2500 rpm it moves. I did a diognostic test and gave me a p0306 code. I dont have a tune. What did I do wrong.

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    cammed & slammed Kaotic_ws6's Avatar
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    Quote Originally Posted by LS1_ws6 View Post
    I just installed pacesetter headers and work great but today the tachometer needle stays down only when I rev it up to 2500 rpm it moves. I did a diognostic test and gave me a p0306 code. I dont have a tune. What did I do wrong.
    maybe a wire or somethin melted? idk why putting headers on your car would affect the tach.

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    Moderator 35th-ANV-SS's Avatar
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    P0306 is cylinder 6 misfiring. Check your spark plug wire to make sure you put it on all the way.

    As far as the tach, you say it stays down yet you mention it moves at 2500? I am a little confused. How does it get to 2500? Or is it at 2500 at idle?

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    The Silver Bullet LS1_ws6's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    P0306 is cylinder 6 misfiring. Check your spark plug wire to make sure you put it on all the way.

    As far as the tach, you say it stays down yet you mention it moves at 2500? I am a little confused. How does it get to 2500? Or is it at 2500 at idle?
    at idle its all the way down like its off but i rev it up the needle goes up to 2500rpm

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    Moderator 35th-ANV-SS's Avatar
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    First thing that comes to mind is maybe a ground. Not real sure.

    I would check all wiring first like above mentioned.

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    The Silver Bullet LS1_ws6's Avatar
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    Ok thanks.

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    Retired NOT tired SteveC's Avatar
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    I had my tach stop working, and threw code P0343, it turned out to be a defective cam sensor, which ofcourse had to be located under the intake manifold.

    SteveC

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    Quote Originally Posted by SteveC View Post
    I had my tach stop working, and threw code P0343, it turned out to be a defective cam sensor, which ofcourse had to be located under the intake manifold.

    SteveC
    Yep and there are three 034x codes that deal with bad CPS IIRC. A low voltage code, high voltage code and a poor performance code (or something like that)

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    Retired NOT tired SteveC's Avatar
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    Quote Originally Posted by SOMbitch View Post
    Yep and there are three 034x codes that deal with bad CPS IIRC. A low voltage code, high voltage code and a poor performance code (or something like that)
    Mine was of the "high voltage" flavor. When it threw the SES light, I was running in "limp mode" which used alot more gasoline, and a considerable amount of carbon in the tailpipe. I had it fixed at a professional shop I have been dealing with for over 20 years, and opposed to me trying to fix it, the job was done correctly.

    SteveC

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    Quote Originally Posted by SteveC View Post
    Mine was of the "high voltage" flavor. When it threw the SES light, I was running in "limp mode" which used alot more gasoline, and a considerable amount of carbon in the tailpipe. I had it fixed at a professional shop I have been dealing with for over 20 years, and opposed to me trying to fix it, the job was done correctly.

    SteveC
    Glad you got it fixed . At least it didn't leave you walking

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    Retired NOT tired SteveC's Avatar
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    Quote Originally Posted by SOMbitch View Post
    Glad you got it fixed . At least it didn't leave you walking
    The real sad part of this all, is that this vehicle is a "garage queen" (01 Z28), I am the original owner, it has 26K miles on it, gets driven once a week. I believe this is an unusual repair for such a low milage, little used vehicle.

    SteveC

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