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Old 04-20-2017, 02:29 PM   #2
Dead Parrot
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Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,809
Re: Fuel System Questions

A lot depends on the emission equipment of the truck. My non-emission 75 with dual tanks vents to the air, doesn't have fuel pump returns and uses a simple 2 in 1 out solenoid selector valve. Others with more emission equipment can have a charcoal canister for the tank vents, fuel pump returns and a 4 in 2 out motor driven valve.

Do you still have the old sending units and or switch valve?
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