240 General: - wurring noise coming and going. PLEASE HELLLLLPPPP !

minty · Jul 31st, 2006, 09:56

Hi, I am now a proud owner of a 240 glt estate (added to my collection of a 740 slaoon and a 480 es).
Can anyone shed any light on to the 240`s very annoying wurring noise that the car emits. I have an idea what it may be.
The noise is really hard to trace, it appears to come from the passenger footwell one minute then the drivers side rear the next.
Must add that the noise at its worst when low on Petrol (just above the red). I would appreciate any advice you have with this "NIGGLE".
Apart from that little issue i am more than impressed with the 240 and find its larger 2.3 engine far more economical than the 740 saloon and probably on a par with the 480`s consumption also.

Hope you can help, Minty

Clifford Pope · Jul 31st, 2006, 10:26

Sounds like the classic symptoms of a failed in-tank fuel pump, causing the main pump to have to work harder, especially when petrol is low.
You can bypass the relay (bridging fuses 4 & 6, on mine anyway) to make the pumps run continuously, then disconnect each in turn to listen for the noise.
If yours just has one pump, it may be worn. Possibly a partly choked filter.

Paul240480 · Jul 31st, 2006, 10:29

Hi, It could well be the in tank fuel pump making the noise. I had an 82' 244 GLT with similar syptoms & like yours was worse as the fuel tank emptied. I used a Volvo specialist mechanic then, and his advice was to put up with it as they tend to go on & on despite the annoying sound & in my case the cost to replace it was far in excess of the cars value. I think there are two pumps, one 'in tank' plus one other. IF I remember correctly you can pull the fuse to the 'other' pump & if the whirring gets louder (as it is now working harder) it will confirm the diagnosis. Sorry if this is a bit vague! I am sure someone else should be able to confirm the procedure I refer two. Good Luck.

minty · Jul 31st, 2006, 11:08

Thanks guys. When you say bridge the two fuses i am alittle unsure as to what exactly you mean and how to carry it out, thanks Minty

minty · Jul 31st, 2006, 11:28

Hi Guys, I have started the car and what happened is the following.
If i remove fuse 4 to the in tank pump there is no change to the running or the noise.

If i remove fuse 6 to the main fuel pump the engine stops completely (the fuse is also very warm)
Help anybody please ?
Thanks Minty

Clifford Pope · Jul 31st, 2006, 12:53

It looks on the face of it that fuse 4 operates the in-tank pump, which has failed or is ailing, so removing the fuse makes no difference. (That's a guess - I'd need to look at the wiring diagram to be sure I've got them the right way round.)
By bridging I just mean joining the terminals together with a short bit of wire- leave the fuses in place. Haynes describes the process. The result is that the pump(s) run continuously but without the engine running, so making diagnosis easier.
If this is the case, and the in-tank pump has failed, leaving it runs the risk it is always said that the extra load on the main pump may cause that to fail too. On the other hand, the in-tank unit is expensive and awkward to extract.
I think we need a few more facts first.

minty · Jul 31st, 2006, 15:02

Thanks Clifford, i have bridged the 2 fuses and it appears that there is noise from only one pump. I held the top of the in tank pump while the two fuses were linked and could feel no movementor vibration, i could hear noise from the tank so am i to assume this is the main pump drawing fuel ?? or is the in tank pump working ??.
I have spoken to the previous owner of the car who tells me he was aware of the noise yet had no idea what it was and because it never caused him any trouble since it started (about 6 months ago)he never felt the need to worry.

Idealy i would like to remedy the problem although there is opinion that says leave it if its not to loud and i will be fine.
Rock and a hard place me thinks !!!!!.
Thanks Kev

Clifford Pope · Jul 31st, 2006, 15:22

If you put your ear to the open fuel filler you should hear a buzzing sound of the in-tank pump running. The external pump is underneath the car, approximately below the rear left hand passenger seat.

I'm assuming your model does have both these pumps - what I've said I can only swear applies to a 93 model. i believe there were some that only had one main pump, and others that had a small extra pump mounted just outside the fuel tank.

octo0072000 · Jul 31st, 2006, 15:29

Quote:

Originally Posted by minty

Thanks Clifford, i have bridged the 2 fuses and it appears that there is noise from only one pump. I held the top of the in tank pump while the two fuses were linked and could feel no movementor vibration, i could hear noise from the tank so am i to assume this is the main pump drawing fuel ?? or is the in tank pump working ??.
I have spoken to the previous owner of the car who tells me he was aware of the noise yet had no idea what it was and because it never caused him any trouble since it started (about 6 months ago)he never felt the need to worry.

Idealy i would like to remedy the problem although there is opinion that says leave it if its not to loud and i will be fine.
Rock and a hard place me thinks !!!!!.
Thanks Kev

Try http://www.gsfcarparts.com/ you can buy the pump unit on its own search on here for fuel gauge problems as tank unit is very fragile cost over £200 only available from volvo so read all about it first. The wires rot off sender unit pump may be ok also rubber pipe from tank unit ti gauge fails as well as it did on mine

minty · Jul 31st, 2006, 16:53

Have sourced a new pump for £40(£40 to fit) or complete secondhand unit from ebay. not really sure which avenue to go as both have risks.

Is the fuel pump in the 1.986cc the same as my 2.300 does any body know, thanks Minty

Jul 31st, 2006, 09:56	#1
minty Trader Last Online: Feb 29th, 2024 19:13 Join Date: Mar 2006 Location: Derby County FC View Photos By: minty	wurring noise coming and going. PLEASE HELLLLLPPPP ! Hi, I am now a proud owner of a 240 glt estate (added to my collection of a 740 slaoon and a 480 es). Can anyone shed any light on to the 240`s very annoying wurring noise that the car emits. I have an idea what it may be. The noise is really hard to trace, it appears to come from the passenger footwell one minute then the drivers side rear the next. Must add that the noise at its worst when low on Petrol (just above the red). I would appreciate any advice you have with this "NIGGLE". Apart from that little issue i am more than impressed with the 240 and find its larger 2.3 engine far more economical than the 740 saloon and probably on a par with the 480`s consumption also. Hope you can help, Minty Last edited by minty; Jul 31st, 2006 at 10:00.

Jul 31st, 2006, 10:29	#3
Paul240480 Ovlovnut Last Online: Feb 25th, 2024 08:58 Join Date: May 2006 Location: Nivillac View Photos By: Paul240480	Hi, It could well be the in tank fuel pump making the noise. I had an 82' 244 GLT with similar syptoms & like yours was worse as the fuel tank emptied. I used a Volvo specialist mechanic then, and his advice was to put up with it as they tend to go on & on despite the annoying sound & in my case the cost to replace it was far in excess of the cars value. I think there are two pumps, one 'in tank' plus one other. IF I remember correctly you can pull the fuse to the 'other' pump & if the whirring gets louder (as it is now working harder) it will confirm the diagnosis. Sorry if this is a bit vague! I am sure someone else should be able to confirm the procedure I refer two. Good Luck. __________________ 2004 V70 2.4SE Auto 'The Welshmobile’ 2002 Laika Ecovip 400i ( Motorhome on an Iveco 2.8TD) http://www.gitessouthbrittany.com/ http://moncopainmonchien.jimdo.com/

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Jul 31st, 2006, 10:26	#2
Clifford Pope Not an expert but ... Last Online: Yesterday 08:50 Join Date: Dec 2001 Location: Boncath	Sounds like the classic symptoms of a failed in-tank fuel pump, causing the main pump to have to work harder, especially when petrol is low. You can bypass the relay (bridging fuses 4 & 6, on mine anyway) to make the pumps run continuously, then disconnect each in turn to listen for the noise. If yours just has one pump, it may be worn. Possibly a partly choked filter.

Jul 31st, 2006, 11:08	#4
minty Trader Last Online: Feb 29th, 2024 19:13 Join Date: Mar 2006 Location: Derby County FC View Photos By: minty	Thanks guys. When you say bridge the two fuses i am alittle unsure as to what exactly you mean and how to carry it out, thanks Minty

Jul 31st, 2006, 11:28	#5
minty Trader Last Online: Feb 29th, 2024 19:13 Join Date: Mar 2006 Location: Derby County FC View Photos By: minty	Hi Guys, I have started the car and what happened is the following. If i remove fuse 4 to the in tank pump there is no change to the running or the noise. If i remove fuse 6 to the main fuel pump the engine stops completely (the fuse is also very warm) Help anybody please ? Thanks Minty

Jul 31st, 2006, 12:53	#6
Clifford Pope Not an expert but ... Last Online: Yesterday 08:50 Join Date: Dec 2001 Location: Boncath	It looks on the face of it that fuse 4 operates the in-tank pump, which has failed or is ailing, so removing the fuse makes no difference. (That's a guess - I'd need to look at the wiring diagram to be sure I've got them the right way round.) By bridging I just mean joining the terminals together with a short bit of wire- leave the fuses in place. Haynes describes the process. The result is that the pump(s) run continuously but without the engine running, so making diagnosis easier. If this is the case, and the in-tank pump has failed, leaving it runs the risk it is always said that the extra load on the main pump may cause that to fail too. On the other hand, the in-tank unit is expensive and awkward to extract. I think we need a few more facts first.

Jul 31st, 2006, 15:02	#7
minty Trader Last Online: Feb 29th, 2024 19:13 Join Date: Mar 2006 Location: Derby County FC View Photos By: minty	Thanks Clifford, i have bridged the 2 fuses and it appears that there is noise from only one pump. I held the top of the in tank pump while the two fuses were linked and could feel no movementor vibration, i could hear noise from the tank so am i to assume this is the main pump drawing fuel ?? or is the in tank pump working ??. I have spoken to the previous owner of the car who tells me he was aware of the noise yet had no idea what it was and because it never caused him any trouble since it started (about 6 months ago)he never felt the need to worry. Idealy i would like to remedy the problem although there is opinion that says leave it if its not to loud and i will be fine. Rock and a hard place me thinks !!!!!. Thanks Kev

Jul 31st, 2006, 15:22	#8
Clifford Pope Not an expert but ... Last Online: Yesterday 08:50 Join Date: Dec 2001 Location: Boncath	If you put your ear to the open fuel filler you should hear a buzzing sound of the in-tank pump running. The external pump is underneath the car, approximately below the rear left hand passenger seat. I'm assuming your model does have both these pumps - what I've said I can only swear applies to a 93 model. i believe there were some that only had one main pump, and others that had a small extra pump mounted just outside the fuel tank.

Jul 31st, 2006, 16:53	#10
minty Trader Last Online: Feb 29th, 2024 19:13 Join Date: Mar 2006 Location: Derby County FC View Photos By: minty	Have sourced a new pump for £40(£40 to fit) or complete secondhand unit from ebay. not really sure which avenue to go as both have risks. Is the fuel pump in the 1.986cc the same as my 2.300 does any body know, thanks Minty

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