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    open loop when at idle

    Hello, my 1988 K3500 with a 7.4 and a th400 trans smells rich at idle and the plugs are black and sooty. My super old NAPA mind reader scan tool says that it goes to open loop whenever I let the truck idle. It doesn't care what the engine temp is it always goes into open loop, is this normal...
  2. B

    coker tire 900-16 summit part#71014

    Has anyone tried these tires on a K3500 with out a lift. I am partial to tall skinny tires. These are the military type tires
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