Re: Fuel Pump Mythbuster #2

Posted by Mike On 2011/6/2 20:11:26

I've noticed that there is a usually a standard 3-4psi still in the line between pump and carb after letting the car sit...if there was a leaky needle/seat valve or float issue, could the residual pressure not over fill the bowl and let some run down into the manifold as it relieves the line? (wouldn't think much, maybe 1-2 tbl spoonfulls?)

Of course the bowl would still be full when the pressure evened out, and i'd imaging what leaked wouldn't be enough to notice when it came to restarting. Maybe you'd have a strong fuel smell a bit after shutting it off?

I don't think we've seen that happen. Food for thought.

After my 2bbl was cleaned, a small crack that the gunk in the carb bowl was sealing was discovered. It drained the fuel out of the carb bowl slowly over a couple hours, leaving the manifold stained and wet, outside the carb.