Which fuel pump - or both

RoryRover · 22nd January 2012, 18:42

Just noticed today a noise inside the car (2004 CDTI )which starts when the ignition is turned on - and a little checking under the bonnet shows the noise seems to be coming from the underbonnet fuel pump.

The car starts and runs just fine at the moment - but I presume its just a matter of time before I have problems.

Having seen other posts in the forum, I have always made sure that I have not let the fuel fall below the quarter tank level since buying the car last April.

So am I likely to just need an underbonet pump or is it likely the tank pump needs doing as well ??

chrissyboy · 22nd January 2012, 19:03

Quote:

Originally Posted by RoryRover

Just noticed today a noise inside the car (2004 CDTI )which starts when the ignition is turned on - and a little checking under the bonnet shows the noise seems to be coming from the underbonnet fuel pump.

The car starts and runs just fine at the moment - but I presume its just a matter of time before I have problems.

Having seen other posts in the forum, I have always made sure that I have not let the fuel fall below the quarter tank level since buying the car last April.

So am I likely to just need an underbonet pump or is it likely the tank pump needs doing as well ??

im a bit confused here .... the pump is supposed to make a make when you turn key ... if the car is working fine then there is no problem ..have a listen in back see if you can hear the in tank pump .if it isnt making a noise then its gone ,but keeping the fuel topped up you dont notice it aint working, the under bonnet one though will be working harder

COLVERT · 22nd January 2012, 21:04

Depends on how much noise.

It is possible to hear a pump in good condition from inside the car as you switch on but don't start the engine. Same with the rear pump if you listen near the rear seat squab. Around 20 seconds before auto switch off if you don't start the engine.

Colvert.

James.uk · 22nd January 2012, 22:29

In this weather it may also be the FBH you can hear????

...

crofts · 22nd January 2012, 23:25

Quote:

Originally Posted by RoryRover

Just noticed today a noise inside the car (2004 CDTI )which starts when the ignition is turned on - and a little checking under the bonnet shows the noise seems to be coming from the underbonnet fuel pump.
The car starts and runs just fine at the moment - but I presume its just a matter of time before I have problems.
Having seen other posts in the forum, I have always made sure that I have not let the fuel fall below the quarter tank level since buying the car last April.
So am I likely to just need an underbonet pump or is it likely the tank pump needs doing as well ??

I had a problem when for first time I went down to the fuel light. Listened for in tank pump.....not working. Replaced by W/Direct.
Then much later had typical 'won't start' problem. Called AA thinking it was a sensor but under bonnet pump was faulty.
This is often the case when i/tank pump fails with extra load thrown on u/b pump. However, as a member pointed out, the i/tank pump could have failed long before the running low event as the u/b pump is quite capable of running the car if the fuel level is kept, say, above a quarter tank.
So. suggest you check i/t pump as the noisy u/b pump is likely to be a sign that it is about to fail.

RoryRover · 23rd January 2012, 11:33

Thaks for the feedback !

This noise is definately new and quite loud once the ignition is turned on -and as I do not have an FBH it unfortunately can't be that.

Just this morning I have competed a 100 mile trip in the car and it is running spot on - but I think I will order a new underbonnet pump and see how I get on from there.

Thanks again.

chrissyboy · 23rd January 2012, 11:37

Quote:

Originally Posted by RoryRover

Thaks for the feedback !

This noise is definately new and quite loud once the ignition is turned on -and as I do not have an FBH it unfortunately can't be that.

Just this morning I have competed a 100 mile trip in the car and it is running spot on - but I think I will order a new underbonnet pump and see how I get on from there.

Thanks again.

sounds like the u/bonnet pump is getting tired ,good idea to get one now ready for when it goes completely

22nd January 2012, 18:42	#1
RoryRover Avid contributor Rover 75 Con SE CDTi tourer Join Date: Apr 2011 Location: Derbyshire Posts: 135 Thanks: 6 Thanked 0 Times in 0 Posts	Which fuel pump - or both Just noticed today a noise inside the car (2004 CDTI )which starts when the ignition is turned on - and a little checking under the bonnet shows the noise seems to be coming from the underbonnet fuel pump. The car starts and runs just fine at the moment - but I presume its just a matter of time before I have problems. Having seen other posts in the forum, I have always made sure that I have not let the fuel fall below the quarter tank level since buying the car last April. So am I likely to just need an underbonet pump or is it likely the tank pump needs doing as well ?? __________________ John Mk 2 2004 Rover 75 Connie SE Diesel Tourer I think I'm having a midlife crisis - good innit ?

23rd January 2012, 11:33	#6
RoryRover Avid contributor Rover 75 Con SE CDTi tourer Join Date: Apr 2011 Location: Derbyshire Posts: 135 Thanks: 6 Thanked 0 Times in 0 Posts	Thaks for the feedback ! This noise is definately new and quite loud once the ignition is turned on -and as I do not have an FBH it unfortunately can't be that. Just this morning I have competed a 100 mile trip in the car and it is running spot on - but I think I will order a new underbonnet pump and see how I get on from there. Thanks again. __________________ John Mk 2 2004 Rover 75 Connie SE Diesel Tourer I think I'm having a midlife crisis - good innit ?

22nd January 2012, 21:04	#3
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	Depends on how much noise. It is possible to hear a pump in good condition from inside the car as you switch on but don't start the engine. Same with the rear pump if you listen near the rear seat squab. Around 20 seconds before auto switch off if you don't start the engine. Colvert.

22nd January 2012, 22:29	#4
James.uk Passed Away 2002 Pale Blue. Rover 75 CDTi Connoisseur auto. 170K miles Join Date: Dec 2008 Location: Near the M67. Posts: 14,509 Thanks: 199 Thanked 585 Times in 397 Posts	In this weather it may also be the FBH you can hear???? ...