Toyota 4Y carburater problem float chamber drains over night
I bought a new Toyota 4Y engin, but struggle with the carburater supplied with the engin. The float chamber keeps on draining fuel overnight. No obvious leakages is observed. What can be the probelm. Any info on connecting the vacuum pipes on the carb? Just want to check all possibilities.
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Most likely the carburetor needs cleaning - if flooded the fuel chamber wasn't closed properly and excess amounts of fuel came in. A tiny grain of sand or similar can cause this. When cleaned the fuel filter should be replaced also.
When A/c is turned on the idle up actuator is activated which is connected to the carburetor shaft which connects to the secondary throttle. If secondary throttle is adjusted to much so as the butterfly valve opens to wide more fuel will enter the engine. Check fuel float in the carburetor float chamber , if it is adjusted to high. Readjust for proper level, to do this invert the carburetor cover with the float connected, the float should be horizontal in position with regards to the cover of the carburetor. To high a float would cause fuel to seep in the carburetor chamber and into the engine.