Hello,
Still working the fuel issue on my 87 F150 XLT Lariat 5.0l. I have found that is is MUCH easier to remove the bed for access to the tanks, wiring and other stuff. Both in tank pumps were toast. The front pump/sending unit has been replaced. The aft tank, besides being filled with some really nasty old gas, has about 2 inches of what looks like tar in it. its really gooey like syrup. I am wondering if someone was trying to vandalise this vehicle. When I opened the dual function reservoir (6 port), there was an o-ring lying in the cup, and one of the valves or pistons is pushed up into the body. I presume I need a replacement. Does anyone know where to find an aftermarket replacement? Will a different year model work? What is a reasonable cost?
Any help or ideas are much appreciated.

 

I don't know where to get a new one but '87-'89 will work. I think pre-'87 fuel injected has them too.

 

Here ya go,
http://www.stangler.com/motorsports/...alve/index.htm

 

I just posted on another thread about the DFR, i can get them for 17 bucks and LMCtruck has them for around 230. junkyards can be easier sometimes for hard to find parts.