i have a '87 F-150 4X4 300 straight 6 short box.who ever had the truck before me butchered the fuel lines up.it had dual tanks before,but now has only rear tank.they bypassed the tank selector by puting a 3/8" fuel line (rubber) from the tank to the fuel pump on the frame.leaving the original plastic connectors and slipping the 3/8""rubber hose over the lines and using hose clamps.is that line to big? i think it is because i think the line is colapsing and starving the engine causing it to die.after an hour or so it starts up and will go another hour.am i right? do i need an original plastic fuel line or just a smaller rubber one? thanks for the help.

 

If it was mine I would go to a salvage yard and get a single tank reservoir out of say a 1986-89 Truck, Bronco or Bronco II and bolt it on the frame and then push your fuel lines onto it and put the hair pin clips in.
The reservoir may solve your problems as the high pressure pump on the frame needs one.

Single tank reservoir:


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thanks, could you explain what the single tank reservoir do.i don't quite understand.

 

They prevent surging, lack of power, staling going up hills.

 

thanks,i guess i need to get fuel lines to, because the fuel lines are allready cut and 3/8" hose is in place,thanks to the past owner.

 

i noticed i also have a smaller steel tube on the right side going from the rear tank to the engine bay going nowhere.is this a vent line? this has become a intresting project woods truck.

 

Yes, on my '88 460 it goes to the two vent canisters near the battery and radiator.

 

mine goes nowhere. what is the vent canister?

 

The charcoal canister that absorbs fuel vapors. The ECU will periodically open the canister purge valve while the vehicle is being driven to feed the vapors into the throttle body. You either have one or two, I'm not sure whether it has to do with how many tanks the vehicle has.

 

where can i get a single function reservoir? i've been on line and can't seem to find a new one.i'd prefer new vs. used.

 

Used is good, there are no moving parts in it to ware out. Maybe a Ford dealer could order one but as they never go bad no auto parts store would carry them and maybe not a Ford dealer either.
The 1986 and maybe 1985 single function reservoirs had a filter in them but other years move the filter to the frame forward of the single function reservoir.

 

thanks,i'm having no luck finding one anywhere omline or anywhere else.i guess i'll be going to the junk yard in the next few days. again thanks.

 

i found a new one on the Truck Parts and Truck Accessories for Chevy, GMC, Ford and Dodge Trucks from LMCTruck.com website.they call it a fuel reservoir assembly EFI for about 80 bucks.granted a used one is cheaper but i won't have to take it apart and clean the crap out of it.literally clean the crap out. thanks subford for the info.