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Old 04-04-2005, 14:01   #1 (permalink)
Lee_D
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Disco 3.9 Fuel Pump running on....

1996 v8i ES 3.9 Standard but for a Biogas system.

Go for a drive with anything lower than 1/3rd of a tank of petrol (even when
runninng on gas) and come to a halt. Switch off ignition and hop out and
what I believe is the fuel pump can be heard to be purring away in the tank.
Seems to do this for several minutes then stops.

Only possible linked thing I've found is that when I unscrew the fuel cap
the tank vents and it seems under the two or three times I've tried this
the pump stops.

Doesn't seem to have same symptoms when the tank is above 1/3rd full
(petrol)

Any ideas?

Lee D

--

www.lrproject.com

Workshop photos from Landrover repairs
& other such tinkerings.
Home of Percy the Jag powered Landrover


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Old 04-04-2005, 15:01   #2 (permalink)
Austin Shackles
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Re: Disco 3.9 Fuel Pump running on....

On or around Mon, 04 Apr 2005 20:37:40 GMT, "Lee_D" <lee@lrproject.com>
enlightened us thusly:

>1996 v8i ES 3.9 Standard but for a Biogas system.
>
>Go for a drive with anything lower than 1/3rd of a tank of petrol (even when
>runninng on gas) and come to a halt. Switch off ignition and hop out and
>what I believe is the fuel pump can be heard to be purring away in the tank.
>Seems to do this for several minutes then stops.
>
>Only possible linked thing I've found is that when I unscrew the fuel cap
>the tank vents and it seems under the two or three times I've tried this
>the pump stops.


might be air whiffling in through a vent valve thing, rather than the pump.
'bout the onyl way to be sure would be to lift the rear carpets and the
cover over the pump unit, run it and stop it so it makes the relevant noise,
and then investigate.

or try pulling the pump fuse, which is B8 on mine but probably something
totally different on yours, and see if that makes it stop.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"You praise the firm restraint with which they write -_
I'm with you there, of course: They use the snaffle and the bit
alright, but where's the bloody horse? - Roy Campbell (1902-1957)
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Old 04-04-2005, 16:01   #3 (permalink)
EMB
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Re: Disco 3.9 Fuel Pump running on....

Austin Shackles wrote:

> might be air whiffling in through a vent valve thing, rather than the pump.


I'd be 90% certain this is the source of the noise - I've seen it happen
quite often on a variety of different vehicles.

--
EMB
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Old 04-05-2005, 07:01   #4 (permalink)
Neil Brownlee
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Re: Disco 3.9 Fuel Pump running on....

Hello, Lee_D!

Mine does the same - same solution to make it stop. As it is a pressuriesed
fuel system - maybe it is a feature - to vent the gases through the EGR?

--
Neil


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Old 04-06-2005, 04:01   #5 (permalink)
Lee_D
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Re: Disco 3.9 Fuel Pump running on....

"EMB" <embtwo@gmail.com> wrote in message
news:d2sd66$ap1$1@lust.ihug.co.nz...
> Austin Shackles wrote:
>
>> might be air whiffling in through a vent valve thing, rather than the
>> pump.

>
> I'd be 90% certain this is the source of the noise - I've seen it happen
> quite often on a variety of different vehicles.
>
> --
> EMB


Cheers Chaps,

I'll reinvestigate once I get the keys from Mrs D's mits.

Lee D


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Old 04-06-2005, 11:01   #6 (permalink)
Lee_D
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Re: Disco 3.9 Fuel Pump running on....

"Neil Brownlee" <n.brownlee@pccontrolNOSPAMsystems.com> wrote in message
news:d2u2oc$74v$1@sparta.btinternet.com...
> Hello, Lee_D!
>
> Mine does the same - same solution to make it stop. As it is a
> pressuriesed
> fuel system - maybe it is a feature - to vent the gases through the EGR?
>
> --
> Neil


Oh lord!

Does this mean I'm going to blow engines and gearboxes, get really muddy and
buy a Suit of armour too?

;-)

Lee D


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Old 04-06-2005, 14:02   #7 (permalink)
computer
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Re: Disco 3.9 Fuel Pump running on....

LD> Oh lord!

LD> Does this mean I'm going to blow engines and gearboxes, get really
LD> muddy and buy a Suit of armour too?

LD> ;-)

Yup!!!!

<grin>

--
Neil

4.4 V8 Range Rover Vogue - 'Owl'
4.6 V8 Discovery ES - 'Piglet'
2.5 V6 Freelander GS - 'Kanga'

http://www.pigletsplace.com
http://www.mud-club.com
http://www.4x4prejudice.org


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