Question about 1988 Toyota Pickup

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1988 toyota p/u 22r carb,

RUNS GREAT WHEN COLD OR WHEN I GET ON THE GAS PEDAL.ONCE IT WARMS UP,IT STARTS BUCKING.I'VE CHANGED PLUGS,WIRES,CAP,ROTOR,FUEL FILTER,FUEL PUMP,FUEL CAP,NO CHANGE.I RECENTLY PUT A REBUILT SHORT BLOCK BUT UNFORTUNATELY HAD TO REUSE THE OLD HEAD.AS THE NEW HEAD KEEPED LEAKING COOLANT INTO THE EXHAUST AND OUT THE TAILPIPE.CAN SOMEONE TELL ME WHATS THE DILLY O ? THANKS!!!!

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Hello,
Sounds like you have a bad carb. While the choke is on and active it sucks enough gas into the engine to keep it running. To test this problem run the vehicle until it is up to operating temp. Give it the gas and see if it does the miss and sputter thing. Then using a can of either of other flamable carb cleaner spray some into the air cleaner nozzle while the engine is acting up. If it smooths out for a few seconds the the carb is not gertting enough fuel at high rpm. rebuild the carburator paying attention to the fuel ports in case one or more are plugged up. Also look at the fuel level float and see it it is set at the proper height. It has been a while since working on a 22r carb, but I am not sure if thereis a fuel bowl window that you can look at to see the fuel level with a flashlight. it should be at or slightly above the dot on the glass window in the carb. If low it is a fuel problem. Also while working on it check the pressure on the fuel line at the carb. Your service manual should have a recommended pressure for the carb. Regards, rcampsr

Posted on Feb 21, 2009

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