89 F150 dual tank issue.
Ted
Any ideas why it would not be pulling fuel from the rear tank?
Thanks.
Jeff Strickland
"Ted" <T...@NoSpam.com> wrote in message
news:cywJk.48832$bx1...@bignews1.bellsouth.net...
Dead pump in the rear tank.
Clog.
Jeff Strickland
"Jeff Strickland" <cr...@verizon.net> wrote in message
news:gd666d$lug$1...@registered.motzarella.org...
Blown fuse to the rear pump.
>
Kevin
news:k6ndf417mem6npf9n...@4ax.com:
> I have the same problem on my 1990 F150.
> I never saw the need for two tanks, since I can barely afford to fill
> one at a time. I assumed the pump was shot in the rear tank, but I
> didn't know there was another fuse. Where is it? Is it in the fuse
> in the fuse panel and listed separately?
>
>
there is only one fuse for both pumps on the fords, the solenoid
switches the same power to either pump. the relay is a common failure
point but that will kill all pump power. KB
--
THUNDERSNAKE #9
Protect your rights or "Lose" them
The 2nd Admendment guarantees the others
Ted
Ted
<lett...@invalid.com> wrote in message news:4p0ff4pskbcid1cgo...@4ax.com...
>
> I just checked and there is power to the rear tank when I flip the
> switch, so I know the pump is at fault. The only reason I'd consider
> replacing the rear pump is because it would serve as a backup if the
> front pump failed. However, I know that the rear tank leaks because I
> let a friend drive the truck, so I could snooze while on a trip. He
> pulled into a gas station and started to put gas in the rear tank. I
> woke up just in time to tell him to stop. He put about a gallon in
> that rear tank and later I noticed it was dripping. Since then, I
> duct taped the cap on that tank.
>
Jeff Strickland
<lett...@invalid.com> wrote in message
news:k6ndf417mem6npf9n...@4ax.com...
> I never saw the need for two tanks, since I can barely afford to fill
> one at a time. I assumed the pump was shot in the rear tank, but I
> didn't know there was another fuse. Where is it? Is it in the fuse
> in the fuse panel and listed separately?
>
I don't know, but that's what I would expect.
ajeep...@comcast.net
old john
"Ted" <T...@NoSpam.com> wrote in message
news:cywJk.48832$bx1...@bignews1.bellsouth.net...
Ted
<ajeep...@comcast.net> wrote in message news:Ha6dnUVzmrlBKmfV...@comcast.com...
Ted
<lett...@invalid.com> wrote in message news:le2gf4tniiqavscin...@4ax.com...
>
>>If the pump in the rear tank is bad, why when the switch is in the rear position would the front pump still work? Wouldn't the truck die from lack of fuel?
>>
>>Ted
>
> running from lack of fuel. Now you know !!!!
>
That's my point. On my truck, if I switch from the front to the rear tank, it continues to run, pulling gas from the front tank. It always pulls gas from the front tank.
Jeff Strickland
"Ted" <T...@NoSpam.com> wrote in message
news:cywJk.48832$bx1...@bignews1.bellsouth.net...
I'm confused.
I thought the rear pump was not working, but the real problem is that the
rear pump is never selected. If the rear pump is never selected, then you
have a problem with the selector switch or the valve. Or, the wirinig has
been altered by a previous owner.
I would be chasing down a wiring/electrical problem before I started looking
at the stuff that directs the plumbing where you want it.
You have made this problem sound (to me) as if the front pump stops when the
rear is selected, but the rear does not come on.
I just read that the front pump is on no matter the position of the select
switch. This indicates to me that the select switch does not work. It might
work right, but the wiring somewhere else has been altered so that the front
pump is the only one that is connected, hence it works in both positions of
the switch. This is a very different problem than most of the solutions
offered have been intended to address.
A previous owner might have altered the wires to overcome the ability to
select the rear tank, where the pump actually does not work -- maybe his
wife or kid drove the truck and fiddled with the select switch and he had to
go rescue them with a gas can. Instead of telling them to stop fucking with
the switch, he simply bypassed it so the front pump would get electricity no
matter where it was positioned, and he told them that only the front tank
holds gasoline.
Kevin
news:3qnof419j6359f15d...@4ax.com:
> That's really odd. I dont know how that is possible unless the switch
> is defective. The switch switches fuel pumps, or is supposed to
> anyhow. The only other possibility is that the pumps are both
> connected to a fuel line directly, which I'd suspect would pump gas
> backwards to the other tank. I'd sure like to learn how that is
> occurring. If you find out, please tell all of us. VERY STRANGE!
>
this is not strange at all. the dash switch only goes to the under the
bed solenoid\valve this actually switches the fuel tank level sender
and also switches the supply and return lines to each tank. KB
david
say:
On my old 89, if I recall, the fuel selector valve was not a solenoid.
The valve was a shuttle valve that was activated by low-pressure fuel
flowing from the selected tank to via the low-pressure pump in the tank.
The sender circuits were switched by the dash switch, which also powered
the selected low pressure pump. It was common for the selector valve to
get gunked up and fail to shuttle to the correct tank. I have also heard
of the valve getting stuck part way thus allowing one tank to pump into
the other instead of into the suction line for the high pressure pump.
Old Crow
news:3qnof419j6359f15d...@4ax.com...
> On Sun, 19 Oct 2008 10:03:09 -0400, "Ted" <T...@NoSpam.com> wrote:
>
>>
> is defective. The switch switches fuel pumps, or is supposed to
> anyhow. The only other possibility is that the pumps are both
> connected to a fuel line directly, which I'd suspect would pump gas
> backwards to the other tank. I'd sure like to learn how that is
> occurring. If you find out, please tell all of us. VERY STRANGE!
Does it transfer the fuel out of the rear into the front while it's running?
Some of the new GM trucks are set up that way. Rear tank feeds into front
tank which feeds engine.
--
Old Crow
'82 FLTC 'Pearl'
'87 FLTC 'Fugly'
'61 F-100
BS#133, SENS, TOMKAT, SLOB#13, MAMBM
Ken
> On Sun, 19 Oct 2008 10:03:09 -0400, "Ted" <T...@NoSpam.com> wrote:
>
> is defective. The switch switches fuel pumps, or is supposed to
> anyhow. The only other possibility is that the pumps are both
> connected to a fuel line directly, which I'd suspect would pump gas
> backwards to the other tank. I'd sure like to learn how that is
> occurring. If you find out, please tell all of us. VERY STRANGE!
A glance through this thread suggests that the following may be
helpful. If the 6 is like my V8, the key is a thing called the dual
purpose reservoir. As stated above, selecting the tank activates the
low pressure pump in that tank which feeds the reservoir. The latter
contains some sort of flip flop diaphragm which does the actual
switching. The high-pressure pump draws fuel from there and directs it
to the fuel rail.
Something else: if one tank has had it anyway it does not matter. But
anyone should realise that, if a steel tank is left empty for long
periods both the tank and the sender corrode. So aim to keep both
tanks full. Obviously it does not matter as long as the tanks are both
full frequently. But if, as tends to happen, you favour one tank, then
keep the other one full (and every six months, at the most, use the
fuel in the spare tank and replace it - petrol left in the tank for a
year is barely recognisable as petrol).
I learnt this the hard way and replacement of tank, pump and sender
was not cheap.
Ted
good.
Ted
<lett...@invalid.com> wrote in message
news:3qnof419j6359f15d...@4ax.com...
> On Sun, 19 Oct 2008 10:03:09 -0400, "Ted" <T...@NoSpam.com> wrote:
>
>>
Ted
"david" <no...@nospam.com> wrote in message news:gdjcr8$pkh$1...@aioe.org...
David, you are correct. No electrical to the selector valve. I thought that
it would be the selector valve, so I replaced it with a new one.
Ted
Jeff Strickland
"Ted" <miamite...@bellsouth.net> wrote in message
news:IaRMk.79965$XB4....@bignews9.bellsouth.net...
>
> David, you are correct. No electrical to the selector valve. I thought
> that it would be the selector valve, so I replaced it with a new one.
>
> Ted
>
If there is no electrical TO the valve, then the trouble is not the valve,
it's the electrical that doesn't get to it.
david
electrons to say:
> "Ted" <miamite...@bellsouth.net> wrote in message
Ah, no Jeff. The valve is a shuttle valve, and they were known to get
gunked up and stop working correctly.
Ted
selector valve. Only the 6 fuel lines. One from each tank that feed fuel,
one that feeds fuel to the engine, one return from the engine and two that
return to the tanks.
Ted
Jeff Strickland
"david" <no...@nospam.com> wrote in message news:ge2g9c$m4d$2...@aioe.org...
I understand that. What I'm confused by is the statement that there was no
electricity going to the valve, so the valve was replaced. Seems to me that
the electricity is the trouble in this instance, not the valve.
Usenet Newsreader
the dashboard. When the switch is set to rear, I can hear a whirring
noise from the rear pump. When the switch is set to front, there is no
whirring noise. I recently replaced the rear tank (it was leaking) and
I put in 5 gallons of gas. The truck started up and ran fine for a
short time, but the pump was making strange noises. I was able to
switch back and forth between front and rear tanks and the truck ran
fine, but eventually it stalled and would not start. I added a gallon
of gas, and it eventually started, but stalled out again.
I wonder if I either put the fuel lines on the rear pump backwards, or
the dual tank set up needs both front and rear pumps working properly to
keep the fuel flowing out of and back into the correct tanks?
This is a 1990 F-250 with 5.8 litre engine and the Fuel Delivery Module
- no selector valves or single ro dual function reservoirs.
Usenet Newsreader
that I have a selector valve - I just have a switch that powers either
the pump in either the rear or the front tank. The output lines come
from each tank and merge into a single fuel line that goes into the fuel
filter. The return lines also come out of the engine and split into
return lines that go into each tank.
I guess I need to get some extra gas cans and figure out where the gas
is going. If the rear tank is empty and the front tank is half or more
full, I know that the rear pump is pumping into the front tank. If this
is happening, can I block off the return line to the front tank and
disconnect the pump wires to the front tank and just work off the rear tank?