Bubbling noise under bonnet fuel pump

PITOURET · 27th April 2012, 19:40

I replaced both pumps 10000 m ago with mkon replacements

upto today no problems

the ubp has started to gurgle and the car difficult to start with only a 1/4 full tank

does this sound to you like intank pump failure ?

If so what would you do re mkon supplier ?

FrenchMike · 27th April 2012, 19:47

Quote:

Originally Posted by PITOURET

I replaced both pumps 10000 m ago with mkon replacements

upto today no problems

the ubp has started to gurgle and the car difficult to start with only a 1/4 full tank

does this sound to you like intank pump failure ?

If so what would you do re mkon supplier ?

Do you hear the intank pump purring ?

PITOURET · 27th April 2012, 19:50

No mike not a sound

mh007 · 27th April 2012, 19:52

This is definately in-tank pump failure !

The in-tank pump assembly has a vent valve & when the pump fails & the tank is only 1/4 full, the under-bonnet pump sucks air through this vent valve.

If you put more fuel in, the gurgling will stop but it won't cure your problem until you replace the pump or find out why the pump isn't working.

PITOURET · 27th April 2012, 20:05

The bubbling noise continues even thought the tank is now full

however the engine starts ok or at least over the last three starts

mh007 · 27th April 2012, 20:21

If you can't hear anything from the in-tank pump, this is the first place to start.

Best way is to undo the filler cap & have someone turn on the ignition for you.

You should be able to hear the pump.
(unless of course you want to lift up the rear seat & remove the plate on the O/S)

If you can hear the in-tank pump, I would then lift the pump out & make sure nothing has come apart (making the in-tank pump also suck air)

The problem is, if it is a in-tank pump failure, the under-bonnet pump is working twice as hard so that may fail too !

PITOURET · 27th April 2012, 20:30

Thanks i will investigate tomorrow and get back to you if i may

the fact that the intank pump is the problem concerns me as it has only 10000 miles of service

anyway we shall see what tomorrow brings

thanks again

paul

suffolk boy · 27th April 2012, 22:05

Quote:

Originally Posted by PITOURET

Thanks i will investigate tomorrow and get back to you if i may

the fact that the intank pump is the problem concerns me as it has only 10000 miles of service

anyway we shall see what tomorrow brings

thanks again

paul

hi i fitted both pumps from this company my itp also failed last week only been in a year at the most.itp pump now replaced with a o,e.m one ub pump still working well.and to think i recommended these to other owners still the free pens are nice

PITOURET · 27th April 2012, 22:22

hi suffolk boy

what does o e m stand for?

suffolk boy · 27th April 2012, 22:31

Quote:

Originally Posted by PITOURET

hi suffolk boy

what does o e m stand for?

original manufactors equipment if i put in the right order

27th April 2012, 19:40	#1
PITOURET Avid contributor rover 75 diesel tourer Join Date: Feb 2011 Location: Riscle Posts: 154 Thanks: 21 Thanked 1 Time in 1 Post	Bubbling noise under bonnet fuel pump I replaced both pumps 10000 m ago with mkon replacements upto today no problems the ubp has started to gurgle and the car difficult to start with only a 1/4 full tank does this sound to you like intank pump failure ? If so what would you do re mkon supplier ?

27th April 2012, 19:50	#3
PITOURET Avid contributor rover 75 diesel tourer Join Date: Feb 2011 Location: Riscle Posts: 154 Thanks: 21 Thanked 1 Time in 1 Post	Bubbling noise No mike not a sound

27th April 2012, 19:52	#4
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	This is definately in-tank pump failure ! The in-tank pump assembly has a vent valve & when the pump fails & the tank is only 1/4 full, the under-bonnet pump sucks air through this vent valve. If you put more fuel in, the gurgling will stop but it won't cure your problem until you replace the pump or find out why the pump isn't working. Last edited by mh007; 27th April 2012 at 19:54..

27th April 2012, 20:05	#5
PITOURET Avid contributor rover 75 diesel tourer Join Date: Feb 2011 Location: Riscle Posts: 154 Thanks: 21 Thanked 1 Time in 1 Post	The bubbling noise continues even thought the tank is now full however the engine starts ok or at least over the last three starts

27th April 2012, 20:21	#6
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	If you can't hear anything from the in-tank pump, this is the first place to start. Best way is to undo the filler cap & have someone turn on the ignition for you. You should be able to hear the pump. (unless of course you want to lift up the rear seat & remove the plate on the O/S) If you can hear the in-tank pump, I would then lift the pump out & make sure nothing has come apart (making the in-tank pump also suck air) The problem is, if it is a in-tank pump failure, the under-bonnet pump is working twice as hard so that may fail too !

27th April 2012, 20:30	#7
PITOURET Avid contributor rover 75 diesel tourer Join Date: Feb 2011 Location: Riscle Posts: 154 Thanks: 21 Thanked 1 Time in 1 Post	Thanks i will investigate tomorrow and get back to you if i may the fact that the intank pump is the problem concerns me as it has only 10000 miles of service anyway we shall see what tomorrow brings thanks again paul

27th April 2012, 22:22	#9
PITOURET Avid contributor rover 75 diesel tourer Join Date: Feb 2011 Location: Riscle Posts: 154 Thanks: 21 Thanked 1 Time in 1 Post	hi suffolk boy what does o e m stand for?