Diesel engine cutting out

MevagisseyMedic · 6th September 2014, 19:52

Hi all, posting this one for someone in the village with no pc.

He has a 2001 2l diesel manual saloon, which cuts and intermittently struggles to start. It has stopped when he has put his foot on the clutch

What i have noticed is when both his and my car are side by side and with ignition in 2nd position his fuel pump is a lot noisier than my 2l diesel.

I have checked plenum drain an all is ok there.

Help please.

steve811 · 6th September 2014, 21:14

Are both (ITP and UBP) running? It may be that one has failed (the intank pump) and the under bonnet pump is struggling under load.

MevagisseyMedic · 6th September 2014, 21:29

Thanks, will check tomorrow

MevagisseyMedic · 7th September 2014, 20:44

could not hear the rear pump working but if you remove the fuel feed at the filter you get fuel coming out.

The front pump seems to go on running for more than the recommended 30 - 60 seconds

bl52krz · 7th September 2014, 20:55

Perhaps the ubp is not supplying enough fuel to the hp pump. Could be the sensor on the fuel filter head (low fuel pressure sensor) When was the fuel filter last changed?

Mike Noc · 7th September 2014, 20:55

Try running with the MAF unplugged.

MevagisseyMedic · 7th September 2014, 21:27

Quote:

Originally Posted by Mike Noc

Try running with the MAF unplugged.

Would that make the pump any quieter. What i have thought about doing is swapping my pump over to see if it makes any difference.

I take unplugging the maf would rule out the stalling problem.

Mike Noc · 7th September 2014, 22:18

No unplugging the MAF won't affect the UBP, but stalling at idle can be due to a faulty MAF.

A noisy UBP can be due to it being worn, a blockage somewhere on the low pressure side, or air getting in.

A drop in LP fuel pressure, detected at the sensor on the filter, usually puts the engine into limp mode, but if you have a spare UBP then well worth swapping them over.

MevagisseyMedic · 10th September 2014, 18:50

Seems funny I new I had a use for my spare stethoscope, as its a bit noisy where we live, was able to slide stethoscope under squib and was able to hear pump running.

so doesn't answer noisy ubp, will have to check fuel line from ubp to engine

MevagisseyMedic · 13th December 2014, 14:19

Its been a while now so I thought I better let you know what the problem was,

Fuel Filter solid/clogged although when I first met this guy he had just replaced the fuel filter which was why I never thought about looking at it, advised him to replace filter at least 6 times a year if not more.

The tank was full of gunge in the bottom, after draining tank you was able to scoop the gunge out with your hand.

So what is the best additive to put in the tank to break down any remaining residue.

6th September 2014, 19:52	#1
MevagisseyMedic Avid contributor Rover 75 Club Tourer 2002 Auto Join Date: Apr 2014 Location: Mevagissey, Cornwall Posts: 234 Thanks: 19 Thanked 19 Times in 14 Posts	Diesel engine cutting out Hi all, posting this one for someone in the village with no pc. He has a 2001 2l diesel manual saloon, which cuts and intermittently struggles to start. It has stopped when he has put his foot on the clutch What i have noticed is when both his and my car are side by side and with ignition in 2nd position his fuel pump is a lot noisier than my 2l diesel. I have checked plenum drain an all is ok there. Help please.

7th September 2014, 20:55	#5
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,386 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Perhaps the ubp is not supplying enough fuel to the hp pump. Could be the sensor on the fuel filter head (low fuel pressure sensor) When was the fuel filter last changed? __________________ Great Barr, Birmingham.

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6th September 2014, 21:14	#2
steve811 Banned Rover 75 Tourer CDT Connoisseur SE Join Date: Dec 2010 Location: Newport Posts: 1,906 Thanks: 107 Thanked 299 Times in 206 Posts	Are both (ITP and UBP) running? It may be that one has failed (the intank pump) and the under bonnet pump is struggling under load.

6th September 2014, 21:29	#3
MevagisseyMedic Avid contributor Rover 75 Club Tourer 2002 Auto Join Date: Apr 2014 Location: Mevagissey, Cornwall Posts: 234 Thanks: 19 Thanked 19 Times in 14 Posts	Thanks, will check tomorrow

7th September 2014, 20:44	#4
MevagisseyMedic Avid contributor Rover 75 Club Tourer 2002 Auto Join Date: Apr 2014 Location: Mevagissey, Cornwall Posts: 234 Thanks: 19 Thanked 19 Times in 14 Posts	could not hear the rear pump working but if you remove the fuel feed at the filter you get fuel coming out. The front pump seems to go on running for more than the recommended 30 - 60 seconds

7th September 2014, 20:55	#6
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Try running with the MAF unplugged.

7th September 2014, 22:18	#8
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	No unplugging the MAF won't affect the UBP, but stalling at idle can be due to a faulty MAF. A noisy UBP can be due to it being worn, a blockage somewhere on the low pressure side, or air getting in. A drop in LP fuel pressure, detected at the sensor on the filter, usually puts the engine into limp mode, but if you have a spare UBP then well worth swapping them over.

10th September 2014, 18:50	#9
MevagisseyMedic Avid contributor Rover 75 Club Tourer 2002 Auto Join Date: Apr 2014 Location: Mevagissey, Cornwall Posts: 234 Thanks: 19 Thanked 19 Times in 14 Posts	Seems funny I new I had a use for my spare stethoscope, as its a bit noisy where we live, was able to slide stethoscope under squib and was able to hear pump running. so doesn't answer noisy ubp, will have to check fuel line from ubp to engine

13th December 2014, 14:19	#10
MevagisseyMedic Avid contributor Rover 75 Club Tourer 2002 Auto Join Date: Apr 2014 Location: Mevagissey, Cornwall Posts: 234 Thanks: 19 Thanked 19 Times in 14 Posts	Its been a while now so I thought I better let you know what the problem was, Fuel Filter solid/clogged although when I first met this guy he had just replaced the fuel filter which was why I never thought about looking at it, advised him to replace filter at least 6 times a year if not more. The tank was full of gunge in the bottom, after draining tank you was able to scoop the gunge out with your hand. So what is the best additive to put in the tank to break down any remaining residue.