Fuel Selector Valve?

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Apr 22, 2009 | 05:00 PM

#16

EPNCSU2006

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Joined: Nov 2002

Posts: 9,556

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From: Concord, NC

Quote:

Now at the expense of sounding ingorant. how do you determine which line is the return line and which is the send line without pulling the pump?

The feed and return use different size tubing; the feed being the larger of the two.

Quote:

Thanks Number, but after some research, my truck doesn't actually use a selector valve

This should be correct. I have never seen a truck newer than '90 that used an external switching valve. If someone knows of one that did, I'd like to see it.

Apr 22, 2009 | 05:06 PM

#17

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

Likes: 784

From: Simi Valley, CA

Quote:

Originally Posted by EPNCSU2006

This should be correct. I have never seen a truck newer than '90 that used an external switching valve. If someone knows of one that did, I'd like to see it.

If thats the case, why is it listed in the 1990/2002 Ford Light Truck Parts Catalog for 1990/93's?

And...btw...I knew the part number the sec I read the post, as I've listed it here before...several times...for others that have asked about it.

Apr 22, 2009 | 05:18 PM

#18

jr32560

Fleet Owner

Joined: Jan 2008

Posts: 26,898

Likes: 3

From: southern md

Quote:

Originally Posted by NumberDummy

I might be wrong but from years of crawling under these things and looking at fuel lines I thought I saw something that looked like a fuel relay or switching device of some sort-should be something to switch between tanks

Apr 22, 2009 | 05:21 PM

#19

tazzmann01

Thread Starter

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Sorry, not trying to cause any arguments here, but I followed the fuel lines from the tanks all the way up to the engine and no fuel selector valve anywhere on the frame, so this truck apparently doesn't have one. I spoke to the Ford dealership again and they concurred that certain 1990 F-150's did not have a fuel selector valve. They did say that the check valve part number can be looked up via the recall number 93s68 and the cost for the check valve....hold on for this... is $99 each. So for now, since I am un-employed at the moment, am going to put the bed back on and just switch between tanks to keep the fuel level correct until I can afford to replace the fuel pumps/FDMs. <sigh>

Thanks for the help everyone.

Mike

Apr 22, 2009 | 05:22 PM

#20

EPNCSU2006

Lead Driver

Joined: Nov 2002

Posts: 9,556

Likes: 43

From: Concord, NC

Quote:

Originally Posted by NumberDummy

If thats the case, why is it listed in the 1990/2002 Ford Light Truck Parts Catalog for 1990/93's?

I haven't a clue. Have you seen one on a 90-93 truck, or just in the 'fische?

Quote:

Originally Posted by NumberDummy

And...btw...I knew the part number the sec I read the post, as I've listed it here before...several times...for others that have asked about it.

And we've had this discussion before too. Maybe some trucks used the external switching valve, but to give someone a part number and tell them "this is what you need" without any regard to what is actually used on their truck could cause someone to waste their money. Thanks for being an excellent resource, but don't always assume your parts list applies to every truck on the road...

Quote:

Originally Posted by jr32560

What year truck? My 87 uses an external switching valve; my dad's 92 does not. Tazzmann01's 90 does not.

Quote:

Originally Posted by tazzmann01

So for now, since I am un-employed at the moment, am going to put the bed back on and just switch between tanks to keep the fuel level correct until I can afford to replace the fuel pumps/FDMs

You should only have to replace the FDM in the tank where the fuel is going, not necessarily both tanks.

Apr 22, 2009 | 05:41 PM

#21

lisagoud

Fleet Mechanic

Joined: Nov 2003

Posts: 1,500

Likes: 2

my 1991 F350 uses an external switch valve just like my 1989 but no hi pressure pump between it and the engine...I stand behind what I initially said but did not know some 1990 tryucks didn't have it. I learned something new today...hope you all did as well.

Apr 22, 2009 | 06:10 PM

#22

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

Likes: 784

From: Simi Valley, CA

Quote:

Originally Posted by EPNCSU2006

I haven't a clue. Have you seen one on a 90-93 truck, or just in the 'fische?
I have to honestly say in the fiche, because while I may have seen the valves years ago...it has been 12 years ago.

And we've had this discussion before too. Maybe some trucks used the external switching valve, but to give someone a part number and tell them "this is what you need" without any regard to what is actually used on their truck could cause someone to waste their money.

The reason I gave the number previously was the OP's listed the ID number off it...which is molded into the plastic.

This valve also fits earlier models.

And this time...I didn't say "this is the one you need."

Apr 22, 2009 | 06:42 PM

#23

dustybumpers

FTE Legend

Joined: May 2008

Posts: 56,542

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From: In my own world

number dummy is correct. he is giveing you the part to replace. most people just replace the whole fuel pump assy., fuel guage and all. how unfortunate that we live in a socioty of parts changers, not repair people

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Apr 22, 2009 | 11:00 PM

#24

tazzmann01

Thread Starter

New User

Joined: Apr 2009

Posts: 16

Likes: 0

ok, so I am confused. Is that part number for the fuel selector valve (which I don't have), the fuel delivery module or the fuel pump?

Apr 23, 2009 | 04:29 AM

#25

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

Likes: 784

From: Simi Valley, CA

Quote:

Originally Posted by tazzmann01

ok, so I am confused. Is that part number for the fuel selector valve (which I don't have), the fuel delivery module or the fuel pump?

Post #14 clearly states it's the: Fuel Tank Selector Valve and Reservoir Assembly, the part you say you do not have...so..you don't need it.

Did you happen to contact FTE sponsor FTEpartsguy.com for assistance in locating the correct part?

This is Ed Olson, parts manager @ PARR FORD in Bremerton. Ed will assist you, there's no charge, no obligation to buy anything.

Apr 23, 2009 | 07:21 AM

#26

subford

Fleet Owner

Joined: Aug 2005

Posts: 23,667

Likes: 301

From: Easton,Ks

The part he was looking for is this outside check valve for the pressure line:
http://i54.photobucket.com/albums/g9...heckValve2.jpg

http://i54.photobucket.com/albums/g9...heckValve1.jpg

It was used in the 1990-1993 ford truck recall some f-series trucks had bad Fuel pressure regulators that made the high pressure check valve in the Fuel Delivery Module go bad or so said Ford in the recall. They used the above check valves so they did not have to replace the FDM. They also replaced the FPR in the recall.
The Recall:
https://www.ford-trucks.com/recalls/...y-1993/t-28401

FDM:
http://i54.photobucket.com/albums/g9...yAssembly2.gif

The Mechanical fuel selector valve/reservoir was last used on the 1990 Ford Truck and 1991 E-series vans.
http://i54.photobucket.com/albums/g9...ectorvalve.jpg

The valve that lisagoud is talking about above is the electrical fuel selector valve and was used on most Diesel truck in the 80's and 90's.
http://i54.photobucket.com/albums/g9...tfuelvalve.jpg

/

Apr 23, 2009 | 08:25 AM

#27

subford

Fleet Owner

Joined: Aug 2005

Posts: 23,667

Likes: 301

From: Easton,Ks

The Check Valve Part Number:

Oct 26, 2016 | 06:52 PM

#28

Kyle Fratina

New User

Joined: Oct 2016

Posts: 1

Likes: 0

i have a 93 f150 and im wondering where i put the inline fuel check valve? i took out the front tank to run straight pipes, and i am running only on the rear tank. when i try to start it it takes a while for the fuel to travel through the lines and reach the engine? help?

Oct 27, 2016 | 04:23 AM

#29

timbersteel

Logistics Pro

Joined: Mar 2005

Posts: 4,698

Likes: 47

From: Mexico, Missouri

Quote:

Originally Posted by Kyle Fratina

It sounds like the check valve(s) in the rear pump are weak or failing. Best to invest in a new rear pump since you gonna be dependent on it from this point on after removing the front saddle tank.

Mar 1, 2020 | 07:15 PM

#30

Josh Jesch

New User

Joined: Mar 2020

Posts: 1

Likes: 0

From: Regent

Quote:

Originally Posted by EPNCSU2006

Don't go crazy looking for the valve. 1990 was the first year for the high pressure in-tank pumps, which eliminated the external switching valve. The switching mechanism is located within each tank, and open or close depending on which fuel pump is running. If fuel is transferring from one tank to the other, replace the fuel delivery module in the tank where the fuel is going.

very good to know. Thanks. Was going nuts crawling under the frame trying to find it on mine today.