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This is driving me absolutely bonkers!!
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Cindi    Posted 06-19-2003 at 16:20:04       [Reply]  [No Email]
I put 27.00 worth of gas in rear tank of my dual tank pickup. I failed to check the number of gallons, okay? I assumed it was a twenty gallon tank. That fill up took me 252 miles. I let it run comletely out on the highway before I switched to the front tank.

Now, when I switched to the front tank, I drove roughly 130 mile round trip and by the time I got back to town, the front tank was dry! So I stopped to fill up the rear tank again and it only held 9.83 or roughly ten gallons. How could it hold 27.00 one time and only 9.83 the next time? What the heck does this mean?

markct    Posted 06-19-2003 at 20:30:59       [Reply]  [No Email]
well the others seem to have identified your problem pretty good, i just would like to mention that you shouldnt run your tank completly dry, ya should switch over before it runs out. in the old days when trucks had mechanical fuel pumps it was fine to run them till they sputtered then change the valve over to the full tank. however with modern in tank electric fuel pumps the fuel is what cools the pump motor,when ya run the tank realy low then the motor heats up more and is alot more likely to fail, our F150 at work has the dual tanks like yours and has had 3 fuel pumps replaced, all in the main tank since everyone runs on the main tank till its completly dry then switches over to the other one, so it is getting run dry allot. this has nothing to do with your problem i just figured i would mention it to help make it less likely for your pump to die an early death

Ron,Ar    Posted 06-19-2003 at 16:53:37       [Reply]  [No Email]
It could be that the tank switching Valve is leaking between tanks, tho not likely. A lot of full size trucks and vans have a larger front tank than rear tank. What vehicle we talking about here?

Burrhead    Posted 06-19-2003 at 16:29:49       [Reply]  [No Email]
sounds like somebody mighta screwed you with the 27 Cindi.

I never saw a standard dual tank hold 27. Most the pu around here have 17 rear and 15 front tanks.

Cindi    Posted 06-19-2003 at 17:18:51       [Reply]  [No Email]
It's a Ford F150. I don't think so Burr, it took forever to fill up, it felt like 27.00 worth of gas. When I refilled it this morning, it stopped so suddenly I couldn't beleive it. I ket trying to force more in, finally turned the key on and looked and the rear tank was showing full. It's a quandry!

Burrhead    Posted 06-19-2003 at 18:33:08       [Reply]  [No Email]
Do you mean 27 gallons or 27$$$???

I got 2 F150s and a F250 and 1 F350 and all of these except the 350 have a rear tank that's 17-18 gals with a front tank of 15-16. The F350 has a rear 18 gals and the front is 16.

I got 1 Ranger and that thing has a 25 gallon single tank.

When I fill up the 350 I have to take out a second mortgage with the 125 gallon aux tank. On the up side I can ride along ways tho.

ret    Posted 06-19-2003 at 18:31:10       [Reply]  [No Email]
This is or was a problem with F 150s from the late 80s to the mid 90s. There even was a recall on them. Sometimes all the fuel in one tank will flow to the tank that is full. Now you got a real problem gas all over the ground. It is going to cost you some bucks to fix it. If it is a 88 or older, you have 3 fuel pumps in it. If 89 or newer, they just used two. Each tank has it own pump. You are lucky that the gauges are accurate, most of them are not. This is just another illustration of why Ford may be on hard times. they can't even make gas guages that register right. Better get it fixed
owner of a 88 F 150 learned too late

Burrhead    Posted 06-19-2003 at 18:36:51       [Reply]  [No Email]
The fuel gages on my 89 F150 stopped working at about 20,000 miles. They fixed them at Ford twice in the 1st year or so and both would quit soon afterwards. I never worried about them and travel on the trip meter.

The 250 and 350's have never been any problems at all.

Cindi    Posted 06-19-2003 at 18:49:48       [Reply]  [No Email]
It's a 1996. And Burr, yes, I meant 27 dollars and 9.83 dollars. I should have made that clear.

Ret, what can I do, if this is the case. Or what should I do I guess I mean, Just fill the tabnks half full? I'm sure I don't have the $$$ to get it fixed right now.

Burrhead    Posted 06-19-2003 at 19:19:22       [Reply]  [No Email]
if it was swapping places with the gas it would have over flowed the other tank by the time you had to refuel.

All of them I ever saw do that had trash in the crossover valve.

I would'nt worry about it unless it over flows.

If it does overflow or gets so it does'nt switch tanks with the dashboard switch just have somebody to take the fuel lines loose and blow it out with compressed air.

What has happened when you have the overflow trouble is that the crossover valve has switched to draw from one tank and is returning the excess fuel from the engine into the other tank that is'nt being drawn from.

Ret    Posted 06-19-2003 at 19:46:10       [Reply]  [No Email]
with all due respect, I know what I am talking about. When I bought this 150, I went into a Ford Truck 150 site because of the fuel gauges not registering right. The first thing that hit me was one thing in common, gas guages not working, and gas flowing from one tank to another.There are more posts on this subject than any other. The old days of blowing out a line are over, I went through them. The idea of a gas guage not working really blew me out,cause this is the first vehicle I ever had that had a bad gas guage, going back to 46 when I got my first car.
Here is a web site for the Ford Forum,

I spend a lot of time in it In fact, there is a new post on this subject tonight

Burrhead    Posted 06-19-2003 at 20:23:50       [Reply]  [No Email]
the 150s are all I've had a problem with and it don't amount to much. I don't doubt your experience at all, but in my case with the pickups here the air compressor has fixed it every time.

Ron,Ar    Posted 06-19-2003 at 19:55:24       [Reply]  [No Email]
I gotta agree with ya, it's been a problem with Ford F-series for a number of years. I worked as Ford service tech for 8 years and it was a big problem. If ya have to pull the pump/gauge assembly it's easier to remove the bed if you have some help. Just unplug the light harness, remove the torx bed retainer bolts and set the bed off. Then you can remove the pumps. There was a problem with the switching valves getting trash in them. It was actually metal cuttings where the switch valve was machined. They get in check valves and fuel tends to run wrong direction.

Cindi    Posted 06-19-2003 at 19:43:14       [Reply]  [No Email]
Okay well, then. I haven't noticed any gas smells or any gas stains where I park, so hopefuly it's not spitting out any gas on the ground. Maybe I'll have that 'blowing out' thing done just for the heck of it.

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