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Please help me identify this fuel system component
Hello, What is this fuel system component called shown in the pictures? It's on my Ford 460 RV engine. I assume it is a return valve for excess fuel to be diverted back to the fuel tank... is this correct?
I was hoping for a little information on how it works, such as what pressure it opens up, how it senses that pressure, etc.
I am asking because while I was working on my fuel system I switched my fuel pumps on manually to observe the fuel delivery to my sight-glass fuel filter next to my carburetor, and I noticed that there didn't seem to be any flow until I started the engine... Is this because the carburetor float needle is capable of holding back pressurized fuel until the engine is started and it allows delivery? Was the fuel being diverted back to the tank through this 3-way valve thing or were my pumps deadheading?
Sorry for the dumb questions and thanks for your help in advance...
I have an 1981 F350 with a 460 that has vapor lock problems. It has two fuel tanks. If I add a fuel vapor separator does the return hose need to switch to the tank that is being used for fuel?
I have an 1981 F350 with a 460 that has vapor lock problems. It has two fuel tanks. If I add a fuel vapor separator does the return hose need to switch to the tank that is being used for fuel?
Yes. That's the setup my RV has. It uses the Pollak 6-port selector valve. If you don't switch the return line to the appropriate tank you could overflow one tank because you're essentially pumping fuel from one into the other. Granted, it's going to go really slow through that tiny orifice in the Vapor Separator, but it's still not a proper setup.
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