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stumbly/mumbly

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by foxman, Oct 27, 2001.

  1. foxman

    foxman 1/2 ton status

    Joined:
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    Location:
    Detroit MI
    (90' K5, 5.7 FI 700R4)O.K. this one might be tuff, When I'm pulling a boat out of the water or slowly climing up a hill, if I don't give it a lot of throttle it "chuggs" along and seems like it wants to die, yet when I let my foot off the gas, the idle quickly dropps off, then returns to normal. I'm thinking: timing, TPS, MAP or any other sensor. Anybody out there fix this one?
     
  2. ArrowheadK5

    ArrowheadK5 1/2 ton status

    Joined:
    Aug 3, 2001
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    Location:
    Northern MN
    my 87 350 EFI does that, but I assumed it was just rough running due to its leaky valves?

    The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
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