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  1. D

    Fast idle after engine is warm..can someone give advice plz

    Kk I'm sure it is warm enough as it was blowing good heat and we went for a cruise down the highway for 20 mins still a fast idle after that.
  2. D

    Fast idle after engine is warm..can someone give advice plz

    I haven't tried that yet as I'm inexperienced with carbs but I'll check it out. The problem just started after it got very cold here -40+ C. It was working fine a couple days ago. I believe it's a factory carb for the 305 121000kms
  3. D

    Fast idle after engine is warm..can someone give advice plz

    1986 gmc Sierra classic 305 4bbl carb. Idles fast even after engine is warm.

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