Thread: Fuel vent

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Originally Posted by Ken1960

holly says I need a 3.5 in there ,would that help on being so rich

Is this a new symptom? Is your motor rich now, or are you referring it to the cause of the gas smell in your garage?

IMHO, the power valve's vacuum rating only relates to when the valve opens and would not cause a gas smell. Also, unless the valve's diaphragm is ruptured, the higher vacuum valve should not cause a rich mixture condition, but rather a momentary lean condition under power. The lower value valve will help eliminate a stumble under hard acceleration.

Originally Posted by 36 sedan

IMHO, the power valve's vacuum rating only relates to when the valve opens and would not cause a gas smell. Also, unless the valve's diaphragm is ruptured, the higher vacuum valve should not cause a rich mixture condition, but rather a momentary lean condition under power. The lower value valve will help eliminate a stumble under hard acceleration.

Sorry I gave you bad advice!
I got the power valve backwards. The power valve is normally open, it is held CLOSED by vacuum. So yes indeed if your power valve value is higher than actual vacuum it can and probably will flood the motor! While it only works while the engine is running, this still could be the reason you are smelling gas! Installing the correct valve may fix this! Sorry for miss direction.