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funky low speed operation

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by fr8train, Sep 27, 2000.

  1. fr8train

    fr8train 1/2 ton status

    Aug 2, 2000
    Likes Received:
    Ok this one has me getting fiesty. A buddys 88 K5 Jimmy 350 TBI has a weird up and down engine rev. Its ok at start up, when we get around the operating temp. the engine will go up and down at 20-35 mph. Sounds like a starve on gas, I put more throttle it goes away. The trans. is switching gears and have no problems going up or down a gear. Help us out please?!?!?!?!?!?!?!

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