Question about 1990 Ford F150

2 Answers

1987 f150 302 the truck runs only on front tank, but it pumps the tank into the rear tank then the rear tank overflows and you run out of fuel in the front, need a cheap quick fix to get through until the first

Posted by on

  • grizfrmmt22 Apr 10, 2011

    Thanks!!! Do I clamp both lines to the rear tank there are two for each tank coming out of the canister looking valve assembly?

×

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Mines doing bout the same i can fill front tank up and gas gauge drops fast. figured out thats its not just the 12 mpgs its going into rear i just run switch back to rear when front tank gets low common issue with the daul tank setup on older fords mines a 90 model

Posted on Dec 29, 2011

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Ford Master
  • 4,977 Answers

It sounds like the switching valve is no good and needs replacing.you can clamp off the fuel hose to the rear tank and just run off the front tank until you can get it repaired.

Posted on Apr 10, 2011

Testimonial: "Very prompt and informative. is useful when you are out in the boonies and no shops close at hand "

  • robert wales Apr 11, 2011

    i think you should be okay to clamp both hoses off

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Why is fuel flowing from front tank to rear tank on the truck that has duel fuel tanks and both tanks are working


I'm not sure but I remember something about a recall or tsb on the one way valve in the fuel line.

Jul 02, 2015 | Cars & Trucks

1 Answer

I have a 1997 F250, 460, Truck will not run on front tank, if I switch to the rear it runs great. If The truck is running on the rear and I switch to the front tank, the truck dies. Ideas?


Have the fuel pressure checked on the front pump when this happens. You either have a defective fuel pump, a defective switch over poppet valve or a defective dash fuel tank selection valve. switch.

Sep 02, 2012 | Cars & Trucks

1 Answer

I have a 2000 gmc 3500hd,the fuel gauge stopped at half way and i run out of fuel. the rear tank is not sending fuel to the front tank?


David Johnson is wrong about that. The Chevy HD dual tank has two sending units, one in each tank , one fuel pump, a fuel pump relay switch and a equalizing pump. If the truck stalls out at 1/2 tank, it is the equalizing pump. That pump, pumps fuel from the rear tank to the front. If the pump is out, the front tank empties, the truck shuts down, the guage reads half tank because the back tank is still full, but the equalizing pump won't pump the rear fuel tank load to the front. Hence the problem you listed above, not a sending unit.

Dec 15, 2011 | Cars & Trucks

2 Answers

1987 f-150 dual tanks fuel problem


You are right. There are three pumps. It sounds like the transfer pump in the front tank is bad. The in tank pumps just supply the high pressure pump to keep it primed. You need the front pump.

Sep 21, 2009 | 1987 Ford F 150

1 Answer

Gas leaking out where you fill the front tank


You probably have a defective fuel-tank selector valve. Its located on the left frame rail, halfway down. While the vehicle is running, tank"A" is pumping fuel to the engine, while tank "B" is getting the unneeded fuel that is returning from the engine. Thats why it is overflowing.

Jun 18, 2009 | 1990 Ford F150

2 Answers

1992 f-150 dual gas tanks tank closest to cab of truck pumps gas out the fuel cap


A FORD EQUIPED WITH DUAL TANKS THIS YEAR MODEL HAS CHECK VALVES IN THE FUEL PUMPS .THE FUEL RUNS FROM THE REAR TANK WHEN IT IS POWERED ON TO A TEE AND INTO THE SAME LINE AS THE FRONT PUMP . THE PROBLEM IS AT THE BOTTOM OF THE FRONT FUEL PUMP THERE IS A CHECK VALVE ON THE FOOT AND IT IS NOT WORKING.WHILE THE TRUCK IS RUNNING WITH THE REAR FUEL PUMP ON IT IS PUMPING FUEL INTO THE FRONT TANK . IT WILL RUN OUT OF THE NECK WHEN IT IS FULL.THE FIX IS SIMPLE REPLACE THE FRONT FUEL PUMP. THEY DONT MAKE A CHECK VALVE REPLACEMENT I CHECKED I HAD THE SAME PROBLEM AS YOU.

Jun 02, 2009 | 1992 Ford F150 SuperCab

3 Answers

Replacement of fuel pump front tank 4.9L 6-cyl 1987 F-150


No u can replace one pump at a time, worked in a ford dealer 20 years, never heard of replacing them as a pair, sounds like one of those urban legends.

May 19, 2009 | 1987 Ford F 150

1 Answer

F150 dual fuel tank problem


I have to say i'm only guessing, but it sounds like the valve that switches the flow of gas from one tank to the other must be sticking part way open, or bypassing or something, and anything your engine doesn't require, is being returned to the front tank, instead of the rear.

Apr 25, 2009 | 1987 Ford F 150

1 Answer

1990 Ford Econoline-front tank


there is a recall for this call your local ford dealer for clarification.

Dec 11, 2008 | 1990 Ford Econoline

Not finding what you are looking for?
1990 Ford F150 Logo

354 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

76070 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

fordexpert

Level 3 Expert

5520 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...