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

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.

 

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

 

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

 

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

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...

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

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

 

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.

 

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."

 

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

 

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.

 

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

/

 

The Check Valve Part Number:

/

 

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?

 

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.

 

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