Yep, HPFP questions!
#1
Yep, HPFP questions!
Hi guys and gals,
I've just got a 2007 cooper s. It occasionally seems to loose power and at idle the engine vibrations seem a bit wobbly, although revs are stable.
I'm going to clean out the intake manifold and valves but I'm also very aware it could be a failing high pressure fuel pump.
Here in the UK there is no extended warranty for the HPFP so I'm on my own.
Question 1 - does anyone know what is actually failing in the HPFP?? Can repair be attempted?
Question 2 - I notice there is a solenoid on the bottom that looks exactly like a pressure regulator valve. I had a similar issue with a Renault diesel in the past and this valve was at fault. Does anyone know the regulator valve part number and can it be replaced??
Thank you all!
I've just got a 2007 cooper s. It occasionally seems to loose power and at idle the engine vibrations seem a bit wobbly, although revs are stable.
I'm going to clean out the intake manifold and valves but I'm also very aware it could be a failing high pressure fuel pump.
Here in the UK there is no extended warranty for the HPFP so I'm on my own.
Question 1 - does anyone know what is actually failing in the HPFP?? Can repair be attempted?
Question 2 - I notice there is a solenoid on the bottom that looks exactly like a pressure regulator valve. I had a similar issue with a Renault diesel in the past and this valve was at fault. Does anyone know the regulator valve part number and can it be replaced??
Thank you all!
#2
#3
Hi,
What you describe sounds like the pressure regulator valve. Looks to be held by 2 bolts and should be replaceable with the right part. No part numbers available for this?
If someone has an HPFP on the bench, maybe they would be willing to pull the solenoid and show what it looks like underneath? This could be as simple as needing new seals on the solenoid.
What you describe sounds like the pressure regulator valve. Looks to be held by 2 bolts and should be replaceable with the right part. No part numbers available for this?
If someone has an HPFP on the bench, maybe they would be willing to pull the solenoid and show what it looks like underneath? This could be as simple as needing new seals on the solenoid.
Last edited by ssashton; 06-02-2017 at 05:27 AM.
#5
#6
I've had no luck getting a part number for the pressure regulator valve although Delphi make a *kind of* similar looking one.
I havnt taken my pump off the car as it doesnt give me problems day to day. If it does get worse, at the very least I will try to get a new seal ring on the valve before changing the whole unit.
Has nobody had the ***** to try reconditioning their own hpfp? I watched a video about doing a different hpfp once and it wasnt that tricky, just lots of bits to keep track of.
#7
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#8
Hello Chaps,
I have removed the fuel pressure regulator valve / solenoid from the high pressure fuel pump on my Cooper S Gen2.
I thought it might help others to share a few photos.
If you are having high pressure fuel pump issues, I would suggest first replacing the seals on this valve or at least checking them. Also dunk the end in some alcohol or clean fuel and activate the solenoid a few times and generally wash it out in case there is dirt.
Annoyingly this part is not sold separately, even though it has a part number on it - 07 161 0136A
The top black rubber seal is 8mm diameter and 1.9mm cross-section. Best I can measure. It might be more like 1.8mm or 2mm c/s since this is a soft material.
The lower black rubber seal is 10mm diameter and 1.5mm cross-section. It might be 10.5mm diameter and 1.5mm - 1.7mm c/s.
You can buy many seals on eBay so get a few sizes Nitrile rubber I think.
I believe this works by one of the holes on the side having high pressure fuel enter and exiting on the other. There is a valve in the middle that is normally closed blowing fuel flow. It opens when power is applied to the solenoid. I found that I can blow through the holes when it is powered up, but not when deactivated.
I honestly don't know what the small hole on the top of the valve does. I can not blow through it under any conditions. When I removed the valve I could see that there is a tiny filter mesh on the end. I think it may be a safety blow-off or perhaps such a small hole only high pressure fuel can flow. I believe the car has a 'low pressure safety mode' of operation and perhaps this is something to do with that.
In my valve the mesh was slightly damaged and the white ring also looked scratched. I think this may be a used part on my HPFP that somebody changed before me.
I have removed the fuel pressure regulator valve / solenoid from the high pressure fuel pump on my Cooper S Gen2.
I thought it might help others to share a few photos.
If you are having high pressure fuel pump issues, I would suggest first replacing the seals on this valve or at least checking them. Also dunk the end in some alcohol or clean fuel and activate the solenoid a few times and generally wash it out in case there is dirt.
Annoyingly this part is not sold separately, even though it has a part number on it - 07 161 0136A
The top black rubber seal is 8mm diameter and 1.9mm cross-section. Best I can measure. It might be more like 1.8mm or 2mm c/s since this is a soft material.
The lower black rubber seal is 10mm diameter and 1.5mm cross-section. It might be 10.5mm diameter and 1.5mm - 1.7mm c/s.
You can buy many seals on eBay so get a few sizes Nitrile rubber I think.
I believe this works by one of the holes on the side having high pressure fuel enter and exiting on the other. There is a valve in the middle that is normally closed blowing fuel flow. It opens when power is applied to the solenoid. I found that I can blow through the holes when it is powered up, but not when deactivated.
I honestly don't know what the small hole on the top of the valve does. I can not blow through it under any conditions. When I removed the valve I could see that there is a tiny filter mesh on the end. I think it may be a safety blow-off or perhaps such a small hole only high pressure fuel can flow. I believe the car has a 'low pressure safety mode' of operation and perhaps this is something to do with that.
In my valve the mesh was slightly damaged and the white ring also looked scratched. I think this may be a used part on my HPFP that somebody changed before me.
Last edited by ssashton; 08-16-2017 at 08:13 AM.
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