Fuel Tank Selector Valve
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From: Pittsburg, KS
Fuel Tank Selector Valve
So I've got an 86 f150 302 efi that's been loads of fun parked in the driveway waiting for more monies to gobble up. My question is even though I bought from Ford a brand new tank selector valve and and in tank pump/sender could it already be clogged or broken after not even half a year? I replaced the high pressure pump tonight too not checking flow after the selector having had know it's basically brand new. So when I still didn't get flow past the high pressure I checked in front of and behind my selector valve and I'm good before it and a slow, basically non existent trickle past the selector valve. Other thoughts welcome too.
Thanks!
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I considered getting an electric selector from auto$one since it's weekend time just to get the darn thing running. I guess other ideas for bypassing the selector would be cool too. I've though about using or canabalizing fuel filters since ford gives us awesome clips that you can't find inlet adapters for.
Thanks!
_____________________________
I considered getting an electric selector from auto$one since it's weekend time just to get the darn thing running. I guess other ideas for bypassing the selector would be cool too. I've though about using or canabalizing fuel filters since ford gives us awesome clips that you can't find inlet adapters for.
Last edited by sckirklan; Jun 6, 2009 at 12:42 AM. Reason: more thoughts, didn't want to double post
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Does it do the same thing on the other tank?
Do you hear the in-tank pump run when you turn on the key for one second?
Flow at selector valve may be from the siphoning effect and not from the tank pump.
These truck of that era had a lot of problems with the wiring under the EEC Power & Fuel Pump relay sockets.
Do you hear the in-tank pump run when you turn on the key for one second?
Flow at selector valve may be from the siphoning effect and not from the tank pump.
These truck of that era had a lot of problems with the wiring under the EEC Power & Fuel Pump relay sockets.
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From: Pittsburg, KS
I didn't check flow from the front tank but the back tank does surge when i key the ignition when i disconnect the tank pump line from the selector valve.
I did check flow after the selector valve from both tanks and get notta. It didn't dawn on me until this morning to check the paper filter but the rubber ring seal in that bowl seemed pretty weak from inspecting my old selector valve but it was 20+ yrs old.
I also thought about taking an air compressor and trying to blast 30-40psi from the tank side of the selector valve but i guess that could mangle the paper filter too eh; not to mention spray the gas from inside the bowl all over?
I've also had the wife key the ignition while i lay under the tank and listen and all sounded well.
I did check flow after the selector valve from both tanks and get notta. It didn't dawn on me until this morning to check the paper filter but the rubber ring seal in that bowl seemed pretty weak from inspecting my old selector valve but it was 20+ yrs old.
I also thought about taking an air compressor and trying to blast 30-40psi from the tank side of the selector valve but i guess that could mangle the paper filter too eh; not to mention spray the gas from inside the bowl all over?
I've also had the wife key the ignition while i lay under the tank and listen and all sounded well.
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
When testing a selector valve never use over 5 PSI air pressure or you will rupture the diaphragm.
If you remove the cup under the valve you will stretch the big "O" ring and it will be very hard to use it again.
You will have to buy a new filter to get a new "O" ring as far as I know you can not just buy the "O" ring.
Only the 85-86 had the filter and most replacement valves do not have a filter in them.
If you remove the cup under the valve you will stretch the big "O" ring and it will be very hard to use it again.
You will have to buy a new filter to get a new "O" ring as far as I know you can not just buy the "O" ring.
Only the 85-86 had the filter and most replacement valves do not have a filter in them.
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Freshman User
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From: Pittsburg, KS
well it looks like the front tank pump may be shot but that shouldn't be an issue considering I replaced the rear tank pump the same time I replaced the selector valve. I'm seriously starting to give consideration to bypassing the selector valve and running the rear tank directly to the high pressure pump.
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