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Old 12-15-2005, 23:01   #1 (permalink)
Slightly Graying Wolf
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Very noisy fuel pump

Over the last month the fuel pump has progressively gotten noisier.

Might it be on its last legs?

Are they difficult to replace (91 LX 2.3L)?

John


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Old 12-16-2005, 07:01   #2 (permalink)
Backyard Mechanic
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Re: Very noisy fuel pump

"Slightly Graying Wolf" <send_trash_here_please@RECYCLEhotmail.com> wrote:

> Over the last month the fuel pump has progressively gotten noisier.
>
> Might it be on its last legs?
>
> Are they difficult to replace (91 LX 2.3L)?


depends on what you'd call difficult... lotsa gas sloshing around.

never do it in a garage

this time of year, i'd say let a pro do it.
--
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
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Old 12-16-2005, 08:01   #3 (permalink)
Michael Johnson, PE
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Re: Very noisy fuel pump

Slightly Graying Wolf wrote:
> Over the last month the fuel pump has progressively gotten noisier.
>
> Might it be on its last legs?


Definitely. Consider yourself lucky for the warning. Many times they
just die with no warning and leave you stranded.

> Are they difficult to replace (91 LX 2.3L)?


If you consider dropping the fuel tank in order to get to the pump
difficult, then let a shop so the work.
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Old 12-16-2005, 08:01   #4 (permalink)
Kruse
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Re: Very noisy fuel pump


Michael Johnson, PE wrote:
> Slightly Graying Wolf wrote:


> > Might it be on its last legs?

>
> Definitely. Consider yourself lucky for the warning. Many times they
> just die with no warning and leave you stranded.



Yea, although Ford pumps are noiser than most others. But it probably
should be done while it still runs. What I find interesting about all
this is that the pump is one price and the fuel pickup is another price
and you have to have BOTH to get the pump warranty. The price of the
fuel pickup is pretty high when you consider it's just a small plastic
screen. I guess they need to make their money somehow.....

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Old 12-16-2005, 08:01   #5 (permalink)
Michael Johnson, PE
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Re: Very noisy fuel pump

Michael Johnson, PE wrote:
> Slightly Graying Wolf wrote:
>> Over the last month the fuel pump has progressively gotten noisier.
>>
>> Might it be on its last legs?

>
> Definitely. Consider yourself lucky for the warning. Many times they
> just die with no warning and leave you stranded.
>
>> Are they difficult to replace (91 LX 2.3L)?

>
> If you consider dropping the fuel tank in order to get to the pump
> difficult, then let a shop so the work.


One other thing, until you get it fixed don't let the fuel level in the
tank go below the 1/2-3/4 mark. The pump is surrounded by the gas in
the tank and it is what keeps it cool. Letting the fuel go low lets the
pump heat up and increases the chance of it failing.
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Old 12-16-2005, 09:01   #6 (permalink)
Backyard Mechanic
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Re: Very noisy fuel pump

"Michael Johnson, PE" <cds@erols.com> wrote:



> One other thing, until you get it fixed don't let the fuel level in the
> tank go below the 1/2-3/4 mark. The pump is surrounded by the gas in
> the tank and it is what keeps it cool. Letting the fuel go low lets

the
> pump heat up and increases the chance of it failing.
>


AGAIN!!!?

Is it or is it not an axial flow pump? I can see the reduction in pump
cooling in 100 deg weather when fuel temps rise and there's limited
cooling... but he's in canada and it aint hot.

To the reverse, running the tank low makes the job a LOT easier!

But remember, it's the fumes that explode, not the liquid.

So STILL let a shop do it... good money spent though you may grit your
teeth.

--
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
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Old 12-16-2005, 09:01   #7 (permalink)
DG
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Re: Very noisy fuel pump

well said backyard.....


"Backyard Mechanic" <pettyfog@yaywho.com> wrote in message
news:Xns972E6D21614DFpettyfogery@207.115.17.102...
> "Michael Johnson, PE" <cds@erols.com> wrote:
>
>
>
>> One other thing, until you get it fixed don't let the fuel level in the
>> tank go below the 1/2-3/4 mark. The pump is surrounded by the gas in
>> the tank and it is what keeps it cool. Letting the fuel go low lets

> the
>> pump heat up and increases the chance of it failing.
>>

>
> AGAIN!!!?
>
> Is it or is it not an axial flow pump? I can see the reduction in pump
> cooling in 100 deg weather when fuel temps rise and there's limited
> cooling... but he's in canada and it aint hot.
>
> To the reverse, running the tank low makes the job a LOT easier!
>
> But remember, it's the fumes that explode, not the liquid.
>
> So STILL let a shop do it... good money spent though you may grit your
> teeth.
>
> --
> Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
> you pay..DEAL with it!



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Old 12-16-2005, 11:01   #8 (permalink)
Ritz
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Re: Very noisy fuel pump

Michael Johnson, PE wrote:
> Michael Johnson, PE wrote:
>
>> Slightly Graying Wolf wrote:
>>
>>> Over the last month the fuel pump has progressively gotten noisier.
>>>
>>> Might it be on its last legs?

>>
>>
>> Definitely. Consider yourself lucky for the warning. Many times they
>> just die with no warning and leave you stranded.
>>
>>> Are they difficult to replace (91 LX 2.3L)?

>>
>>
>> If you consider dropping the fuel tank in order to get to the pump
>> difficult, then let a shop so the work.

>
>
> One other thing, until you get it fixed don't let the fuel level in the
> tank go below the 1/2-3/4 mark. The pump is surrounded by the gas in
> the tank and it is what keeps it cool. Letting the fuel go low lets the
> pump heat up and increases the chance of it failing.




By the same token, if it actually fails when the tank is pretty full, it
can be a supreme pain in the rump to pull the tank when it's that heavy
with fuel. My suggestion is to just run it down to 1/4 tank (or a
little less) and take it to a shop unless you've got access to a lift.
This definitely isn't a job I'd want to do on ramps on a cold garage
floor....

Cheers,
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Old 12-16-2005, 11:01   #9 (permalink)
Michael Johnson, PE
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Re: Very noisy fuel pump

Backyard Mechanic wrote:
> "Michael Johnson, PE" <cds@erols.com> wrote:
>
>
>
>> One other thing, until you get it fixed don't let the fuel level in the
>> tank go below the 1/2-3/4 mark. The pump is surrounded by the gas in
>> the tank and it is what keeps it cool. Letting the fuel go low lets

> the
>> pump heat up and increases the chance of it failing.
>>

>
> AGAIN!!!?
>
> Is it or is it not an axial flow pump? I can see the reduction in pump
> cooling in 100 deg weather when fuel temps rise and there's limited
> cooling... but he's in canada and it aint hot.


I guess a lit match isn't hot either? What makes for a better heat
dissipater a liquid or a gas? The liquid will draw more heat from the
pump. Air is actually quite a good insulator and I bet the pump can
still get quite warm especially if it is in its death throws.

> To the reverse, running the tank low makes the job a LOT easier!


How is this possible? The pump discharge is at the top of the tank and
if the tank is near empty it has additional head to overcome to draw the
liquid to that point verses the tank being full. This in turn requires
the pump to work harder. To simplify the theory, which would require
more effort, pulling a bucket of water up a 100' deep well or a 10' deep
well?

> But remember, it's the fumes that explode, not the liquid.


True but I don't see the relevance of this here.

> So STILL let a shop do it... good money spent though you may grit your
> teeth.


I agree completely on this point.
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Old 12-16-2005, 11:01   #10 (permalink)
Michael Johnson, PE
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Posts: n/a
Re: Very noisy fuel pump

Actually, no it wasn't. ;)

DG wrote:
> well said backyard.....
>
>
> "Backyard Mechanic" <pettyfog@yaywho.com> wrote in message
> news:Xns972E6D21614DFpettyfogery@207.115.17.102...
>> "Michael Johnson, PE" <cds@erols.com> wrote:
>>
>>
>>
>>> One other thing, until you get it fixed don't let the fuel level in the
>>> tank go below the 1/2-3/4 mark. The pump is surrounded by the gas in
>>> the tank and it is what keeps it cool. Letting the fuel go low lets

>> the
>>> pump heat up and increases the chance of it failing.
>>>

>> AGAIN!!!?
>>
>> Is it or is it not an axial flow pump? I can see the reduction in pump
>> cooling in 100 deg weather when fuel temps rise and there's limited
>> cooling... but he's in canada and it aint hot.
>>
>> To the reverse, running the tank low makes the job a LOT easier!
>>
>> But remember, it's the fumes that explode, not the liquid.
>>
>> So STILL let a shop do it... good money spent though you may grit your
>> teeth.
>>
>> --
>> Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
>> you pay..DEAL with it!

>
>

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