When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Yeah gas sure isn't what is was back in the day, all the ethanol and other crap they put in it, it just doesn't hold up....All that old gas I pulled out of the rear tank is being used to run all the 2 stroke engines, they'll burn just about anything....LOL
Well I've been working with this for days now....just can't figure it out. Have gas in both tanks. All 3 pumps work, but after repeatedly trying the only thing getting to the Schrader valve on the fuel rail is air. Can't get gas to pump up. The lines have all new orings and they're all lock in tight.
Have you checked the polarity to all pumps to make sure is correct? Have you disconnected the line from each tank at the selector valve and checked to see if the in tank pumps are pumping fuel up to the selector valve? After that, have you disconnected the line from the selector valve to the HP pump and checked to see if you have flow through the selector valve in both front and rear position? I don't have my page handy at the moment but I believe you said you bought ford manual? In the fuel pump section I believe there is a volume test for the in tank pumps and HP pump. I think that you can use a piece of fuel line clamped onto the selector valve fittings to the HP pump for testing. If you don't have the ford manual then let me know and I will try to look in mine for the info.. I'm babysitting the grandchildren for a few days so its kind of busy around here!
Thanks Annaleigh, I haven't checked as you described, had a heck of a time repla ING the orings and didn't want to pull the lines apart but I guess that will be on the list to do this weekend. I don't understand what you mean by Che king polarity. All the wiring is OEM, I figured the pumps were plug and play.
So you replaced the reservoir yet?
Post picture of it
I have one of those service kits kicking around myself
So. Both in tank pumps (low pressure) supply the reservoir (1 at a time)
And the reservoir supplies the frame pump
Any leak internal in the reservoir and it will suck air
You crack that system in about 4 spots and watch it pump fuel
Possibly each in tank pump has a bad 1 way valve or the hose is torn
Update...looks like the front fuel pump took a dump. New rear pump is working now. I should have double checked my son's work. But I didn't. He didn't plug the harness all the way in and it wasn't making connection. I now comes on for a couple seconds before it shuts off. I have about 1.5 gallons of gas in the rear tank but it may not be enough for the pump to prime because I'm still not getting gas through the lines...they're disconnected before rhe switch valve to see if it would pump gas, so I'll goby 5 gallons tomorrow and put it in the rear tank to see what happens unless someone has other thoughts...I'm open to suggestions.
Update...looks like the front fuel pump took a dump. New rear pump is working now. I should have double checked my son's work. But I didn't. He didn't plug the harness all the way in and it wasn't making connection. I now comes on for a couple seconds before it shuts off. I have about 1.5 gallons of gas in the rear tank but it may not be enough for the pump to prime because I'm still not getting gas through the lines...they're disconnected before rhe switch valve to see if it would pump gas, so I'll goby 5 gallons tomorrow and put it in the rear tank to see what happens unless someone has other thoughts...I'm open to suggestions.
Yeah, I usually never run them below 1/4, but I've only put about 1.5 gals in the rear thank, so I guess it either can't suck the bottom which I find hard to believe or the lines are sucking air some place. I'll put gas in the rear tank tomorrow if that doesn't work I'll probably run New fuel lines and clamp them.
Seeing the holes in the heater line of my 99 E350 back in 2004, I don't put much faith in Ford choosing anything to last beyond the warranty, leaked at every hold down, absolutely hate those clamp connectors on the lines too, fuel, heat, ac they suck.
I avoided dual tank van choices when shopping, stories of the selector issues, return would be on the wrong tank, thus filling the tank you were not driving on, or just refusing to send fuel at all, many out there cheap, "has gas and spark, won't run," I see 2 fuel doors and immediately know, headache, run.
Can you reach the sending unit connections on the rear tank? I replaced my rear pump shortly after i bought my van but that was 6 years ago and I don't remember.
instead of changing the fuel lines you might try using a vacuum pump like the mighty vac. I have one and use it for many things. I also use it when bleeding the brakes by myself. https://www.harborfreight.com/mityva...ump-39522.html
You could block off one end of the fuel line at the tank and use the vacuum at the other end at the selector valve. I believe the fittings are all the same so if you have an old fuel filter or old sending unit that you replaced, you could cut off the straight male fittings and use them to insert into the nylon female fittings. Then you would be able block off one end and connect the vacuum pup to the other end and check for leaks.
You can buy the nylon fuel line on a roll as well as the fittings. There are various tools and different methods of installing the fittings. I will probably need to replace mine at one time or another but have only glanced at how to do it. I am wondering if one can use a heat gun to make bends in the nylon tubing like you can with PVC and other plastics?
Real tough to access the rear tank lines or connector without dropping the tank down some
I have done it but you must be real good with a pick took and have some serious intention
Sticking your head up in there by the rear end, so you can see what you're doing, is the hard part
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
