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Low RPM miss when warm

Discussion in 'The Garage' started by MTBLAZER89, Jul 24, 2006.

  1. MTBLAZER89

    MTBLAZER89 3/4 ton status Premium Member GMOTM Winner

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    On a TBI 454. It was much more pronounced as the motor got hotter and towing. It seems to go away in 3rd gear around 35-40 MPH. It does not do it when it is cold at all. No codes either.

    Any ideas on where to look first?
     
  2. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    It sure sounds like a bad plug wire or ignition component to me. They always show up under load, at operating temperature or hotter, and can disappear at cruising speeds. I'd take a few minutes and check the wires first.....
     
  3. MTBLAZER89

    MTBLAZER89 3/4 ton status Premium Member GMOTM Winner

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    Thats what I was thinking wires or dist issue.
     
  4. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    My K5 had the EXACT same issue quite a while ago. It ended up being ONE bad wire, and it only showed up during acceleration after the truck had warmed up.

    Let us know what you find.
     
  5. MTBLAZER89

    MTBLAZER89 3/4 ton status Premium Member GMOTM Winner

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    will do
     

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