Grounding issues?

Discussion in 'Engine & Drivetrain' started by xulferdica, Nov 10, 2018.

  1. xulferdica

    xulferdica TYF Newbie

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    I have a 2000 GMC Yukon XL that has misfires and has crazy gauge fluctuations when first started but when I run it through a car wash or it rains for several days the check engine light goes off and it runs great until it dries off. I’ve checked almost everything and replaced the ECU. Is this a grounding issue?

    Thanks for any thoughts!
     
  2. drakon543

    drakon543 Full Access Member

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    sounds feasible its about the only thing that would work better if it was wet
     
  3. Big Mama

    Big Mama Full Access Member

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    The battery ground on these is suspect they get corroded at the chassis
     
  4. NardDog

    NardDog TYF Newbie

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    I would guess water in the knock sensors

    But the ground is easy to check its on the bottom drivers side of the engine toward the front. Below the pS pump. Just remove clean and reinstall.
     
  5. NardDog

    NardDog TYF Newbie

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    I would guess water in the knock sensors

    But the ground is easy to check its on the bottom drivers side of the engine toward the front. Below the pS pump. Just remove clean and reinstall.
     
  6. NardDog

    NardDog TYF Newbie

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    .
     
    Last edited: Nov 10, 2018
  7. NardDog

    NardDog TYF Newbie

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  8. NardDog

    NardDog TYF Newbie

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    i
     

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