Quote:
Originally Posted by BarryL
Hello,
The reason the fuel system needs to be bled is that
the pump is an 'on demand' type. When the pump is energized it pressurizes the fuel line to 5-6 psi (for the Facet pump I have) and then shuts down. When the injector pump runs it sucks fuel in, the pressure in the fuel lines drops, and the facet pump turns back on.
So when the engine is not running (or turning over) the fuel pump does not run and can't pump the air out. When you open the 'self bleed return valve' the fuel pump sends fuel back to the tank and the air gets bled.
I wonder what would happen if I left the return valve open a little?
Anway, my next course of action will be to change the fuel lines I messed with, and apply thread sealant to the hose to pump connections.
Barry
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Barry,
my pump runs all the time at the same PSI as yours, or about 25 -30 gals a hour. My WB30 uses 1.2 gals at full RPM, the extra is ALWAYS returned to the tank - what you are describing as the 'self bleed return valve' being open is my normal operating position.
For a secondary benefit, my fuel tank is essentially polished every hour.