2004 v70 d5 fuel pressure problem - Page 2

Bernard333 · Sep 21st, 2014, 10:25

My 2003 D5 has had a T5 in tank pump canister for the past three years with no issues, the in tank pump will not cause engine noise, working or not. A faulty high pressure pump regulator makes the engine sound like a bag of spanners , try unplugging it and running the engine, the resistance check does not mean the regulator is working properly. The in tank pump commutator wears down so it stalls intermittantly and eventually stops, I posted photos of this on here but cannot find them anymore.

themoosdad · Sep 21st, 2014, 13:48

Thanks for the replies.
There is definitely an issue with the in tank pump. Tank is now over 3/4 full with fuel (according to the guage) and with the outlet pipe disconnected at the tank pump and the ignition turned on, just getting a few drips coming out.
The engine does sound like a bag of spanners and I was putting that down to fuel starvation/low pressure due to the tank pump not supplying correctly.
I have disconnected the high pressure pump regulator and it makes no difference to either the running or the noise.
Not sure if maybe there is more than one problem, but my line of thinking is to get the in tank pump supplying correctly first.

5cilinder · Sep 21st, 2014, 15:03

Make sure the pump is primed to absolutely rule out the pickup , those pumps can only pump fluids
Also check the other side of the tank to make sure the hose is not folded etc

themoosdad · Sep 21st, 2014, 15:45

Yes, thanks.
I intend on hooking it up on the bench with some fuel and a 12v supply before laying out money on another.....just need to find more time!!

reggit · Sep 21st, 2014, 21:05

Quote:

Originally Posted by themoosdad

The engine does sound like a bag of spanners and I was putting that down to fuel starvation/low pressure due to the tank pump not supplying correctly.
I have disconnected the high pressure pump regulator and it makes no difference to either the running or the noise.

Is it rattling and generally sounding like a tractor? If so this is down to high fuel pressure. Disconnecting the sensor on the HP pump will simulate this situation on a healthy engine.

I'd suggest either the fuel return line is blocked or the sensor on the high pressure pump in fubar.

I'm watching this with interest btw, as I have both a high and low pressure fault codes I've been unable to remedy.

The car should also run reasonably well with a dead in tank pump until it gets to 1/4 - 1/8th tank level.

themoosdad · Nov 10th, 2014, 10:36

Ok. I found some time at the weekend to pick this back up and have swopped over the fuel pressure regulator at the high pressure pump with the other car.
The rattling/bag of spanners/tractor like noise disappeared. So, a faulty pressure regulator after all!!
The in tank pump is probably faulty as well but the car runs fine, so will leave that for now.

Now to look at the rest of the issues with the car.....when I have time!! Brake pedal sinking and new transmission valve body solenoids next!!

Many thanks for all the help, suggestions and advice.

cheshired5 · Nov 11th, 2014, 16:40

Quote:

Originally Posted by themoosdad

Now to look at the rest of the issues with the car.....when I have time!! Brake pedal sinking

Have a look here http://www.volvoforums.org.uk/showthread.php?t=217324
It may be something simple.
Good news on your other progress.

themoosdad · Nov 11th, 2014, 18:57

Yes....thanks for that. Had read before about the clips being fitted incorrectly and cant remember whether I checked them or not....Too many cars kicking around that I must have a clearout!!

Have also bought one of the Sealy pressurised bleeders a few weeks ago in preparation!!

cheshired5 · Nov 11th, 2014, 23:25

Quote:

Originally Posted by themoosdad

Yes....thanks for that. Had read before about the clips being fitted incorrectly and cant remember whether I checked them or not....Too many cars kicking around that I must have a clearout!!

Have also bought one of the Sealy pressurised bleeders a few weeks ago in preparation!!

I did a brake pad change video where you can see the clips being removed and replaced at the start and the end. The link is in my thread here http://www.volvoforums.org.uk/showthread.php?t=215995
The Sealey bleeder is an excellent purchase. I love mine and it's paid for itself easily already.
If you keep it clean, you can also pressure test cooling systems that have similar expansion tank cap fitments.
I'll get round to doing a pressure bleeding video......one day.

Sep 21st, 2014, 10:25	#11
Bernard333 Premier Member Last Online: Oct 20th, 2021 11:41 Join Date: Nov 2007 Location: Ramelton	My 2003 D5 has had a T5 in tank pump canister for the past three years with no issues, the in tank pump will not cause engine noise, working or not. A faulty high pressure pump regulator makes the engine sound like a bag of spanners , try unplugging it and running the engine, the resistance check does not mean the regulator is working properly. The in tank pump commutator wears down so it stalls intermittantly and eventually stops, I posted photos of this on here but cannot find them anymore.

Sep 21st, 2014, 13:48	#12
themoosdad New Member Last Online: Jul 6th, 2021 09:59 Join Date: Mar 2007 Location: brighton	Thanks for the replies. There is definitely an issue with the in tank pump. Tank is now over 3/4 full with fuel (according to the guage) and with the outlet pipe disconnected at the tank pump and the ignition turned on, just getting a few drips coming out. The engine does sound like a bag of spanners and I was putting that down to fuel starvation/low pressure due to the tank pump not supplying correctly. I have disconnected the high pressure pump regulator and it makes no difference to either the running or the noise. Not sure if maybe there is more than one problem, but my line of thinking is to get the in tank pump supplying correctly first.

Sep 21st, 2014, 15:03	#13
5cilinder Premier Member Last Online: Yesterday 04:41 Join Date: Oct 2011 Location: Groningen	Make sure the pump is primed to absolutely rule out the pickup , those pumps can only pump fluids Also check the other side of the tank to make sure the hose is not folded etc

Sep 21st, 2014, 15:45	#14
themoosdad New Member Last Online: Jul 6th, 2021 09:59 Join Date: Mar 2007 Location: brighton	Yes, thanks. I intend on hooking it up on the bench with some fuel and a 12v supply before laying out money on another.....just need to find more time!!

Nov 10th, 2014, 10:36	#16
themoosdad New Member Last Online: Jul 6th, 2021 09:59 Join Date: Mar 2007 Location: brighton	Ok. I found some time at the weekend to pick this back up and have swopped over the fuel pressure regulator at the high pressure pump with the other car. The rattling/bag of spanners/tractor like noise disappeared. So, a faulty pressure regulator after all!! The in tank pump is probably faulty as well but the car runs fine, so will leave that for now. Now to look at the rest of the issues with the car.....when I have time!! Brake pedal sinking and new transmission valve body solenoids next!! Many thanks for all the help, suggestions and advice.

Nov 11th, 2014, 18:57	#18
themoosdad New Member Last Online: Jul 6th, 2021 09:59 Join Date: Mar 2007 Location: brighton	Yes....thanks for that. Had read before about the clips being fitted incorrectly and cant remember whether I checked them or not....Too many cars kicking around that I must have a clearout!! Have also bought one of the Sealy pressurised bleeders a few weeks ago in preparation!!

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