1993 GMC V8 bogging/flooding?

I have a 1993 GMC with a 350, it is the electric carbed motor. I know my quadrojets not these computerized things. Anyways, if the truck sits at idle for a short period of time, it bogs and when you give it any gas it stalls. It stays at idle (100km/h) on the highway no problem, but if you stomp in it, again it bogs. It is pumping a crap load of fuel into the carb, anyone know what it could be?


Note* Brand new O2 sensor.

3 Answers

  • 9 years ago
    Favorite Answer

    It's known as Throttle Body Injection or TBI.

    TPS Sensor, Fuel pressure. I would start there.

    Rocker arm adjustment set at 1/4 turn past zero lash also perks them up very nicely.(Including mileage).

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  • 9 years ago

    Your o2 sensor detects how well the fuel is being burnt by reading your exhaust gasses and is what directs the fuel injection to pump more fuel or lean out the fuel flow. When they go bad, the motor will always run rich. I would start by looking there.

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  • Dennis
    Lv 7
    9 years ago

    QJ's were famous for "water logged" sinking floats.

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