I have a 1989 K1500 with a 5.7. Truck will start & run OK until it warms up. Once it warms to running temperature, it will not accelerate. Backfires thru the TBI. Extreme loss of power. Have replaced IAC, ESC, TBI throttle body gasket, complete fuel pump. Even cleaned tank. I am loosing my mind. Had to have it towed home yesterday. What could be my problem? HELP

Asked by Aug 05, 2017 at 10:28 AM about the 1989 Chevrolet C/K 1500

Question type: Maintenance & Repair

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