2001 V40 Diesel no power

lynns hubby · Nov 14th, 2020, 13:06

Just replaced the top centre vents on my daughters 2001 V40 2 Ltr diesel.
Obviously I had to remove various bits from centre dash.
Since I changed out the vents, the vehicle has no power. It starts and ticks over fine but when driving it feel as though the turbo is not spooling up. Its just "Gutless". It was absolutely fine before as I drove it round from hers.
I cant for the life of me imagine how removing and refitting a couple of bits of dash has caused this, but appreciate there are members out there with far more knowledge than me.
There are no engine management lights on.

gatos · Nov 14th, 2020, 19:39

Nothing you've done on the dashboard would have caused this. I guess it's just a coincidence.

Try unplugging the MAF and see if it makes a difference. Other things that can cause this, is blocked EGR or faulty N75 valve, or a burst airhose(intercooler, hose, or turbo inlet hose from airvox etc)

lynns hubby · Nov 15th, 2020, 10:01

I couldn't see it being anything dash related but you know what its like when its not your car and you have done something and then something else goes wrong !!!!!! Trying to explain it to other people is not easy.
Yesterday I removed both intercooler hoses and the turbo inlet hose. There is definitely no issues there. I did remove the EGR solinoid which is free, the little plunger moves freely against the spring pressure. As you know, the actual EGR valve does not lend itself to being removed easily and as I had no spare I left it in place, however this also moves freely with no issues and was not clogged so I am confident the issue is not with this.
When my daughter brings the car round next, I will try unplugging the MAF.
What is this N75 valve you talk about and where can I find it.
The other thought at the front of my mind is the fuel filter. This was changed in April and I would have expected a slow deterioration in power not just from stopping the engine and then restarting it after completing the vent change.
Thanks for you help

gatos · Nov 15th, 2020, 11:36

The N75 valve is the turbo boost control valve mounted at the top of the bulkhead kind of between the fusebox and the turbo. It is the on with a plug going into it and 3 small vacuum lines. If you follow the vacuum line from the top of the turbo, it plugs in to the N75 valve

With regards to fuel filter, it not along since you've replaced it, so not sure. Did you make sure you cleaned the fuel filter housing of all fluids before you put the new filter? Water tends to collect at the bottom.

lynns hubby · Nov 18th, 2020, 09:34

Just to let you know, it was the Turbo boost control valve. It took a couple of days to get one so only fitted it last night and car is back to normal again😀 Didn’t want to reply until We were sure. Thanks for your help.

gatos · Nov 18th, 2020, 10:49

Excellent. Nice and easy fix and it didn't break the bank. Glad I could help

lynns hubby · Nov 18th, 2020, 11:35

£57 inc VAT took some finding! Even Volvo didn’t have a part number. I managed to get a number from the old one and my local factors got one for me.
I used them as if it was wrong they would have took it back😀

P156KWJ · Nov 18th, 2020, 12:02

Quote:

Originally Posted by lynns hubby

£57 inc VAT took some finding! Even Volvo didn’t have a part number. I managed to get a number from the old one and my local factors got one for me.
I used them as if it was wrong they would have took it back😀

Do you have a part number available at all? Wondering if it was used in anything else

lynns hubby · Nov 18th, 2020, 13:13

I will get it later and let you know. I am sure it is used for VWs and obviously Renault as it’s their engine

lynns hubby · Nov 23rd, 2020, 17:48

Pat Nos as read from the new part. 7.21903.44
20T220
Sorry for the delay. Been waiting for my daughter to reply with the info.
Hope this helps for anyone else looking. As I said earlier, neither my local dealer or FRF could help with a part number.

Nov 14th, 2020, 13:06	#1
lynns hubby Master Member Last Online: Today 11:15 Join Date: Oct 2011 Location: Great Yarmouth	2001 V40 Diesel no power Just replaced the top centre vents on my daughters 2001 V40 2 Ltr diesel. Obviously I had to remove various bits from centre dash. Since I changed out the vents, the vehicle has no power. It starts and ticks over fine but when driving it feel as though the turbo is not spooling up. Its just "Gutless". It was absolutely fine before as I drove it round from hers. I cant for the life of me imagine how removing and refitting a couple of bits of dash has caused this, but appreciate there are members out there with far more knowledge than me. There are no engine management lights on.

Nov 14th, 2020, 19:39	#2
gatos Premier Member Last Online: Nov 15th, 2022 21:34 Join Date: Apr 2010 Location: London / Essex	Nothing you've done on the dashboard would have caused this. I guess it's just a coincidence. Try unplugging the MAF and see if it makes a difference. Other things that can cause this, is blocked EGR or faulty N75 valve, or a burst airhose(intercooler, hose, or turbo inlet hose from airvox etc) __________________ Current car: 2002 S40 1.9D, 1992 240SE Nullius in Verba

Nov 15th, 2020, 11:36	#4
gatos Premier Member Last Online: Nov 15th, 2022 21:34 Join Date: Apr 2010 Location: London / Essex	The N75 valve is the turbo boost control valve mounted at the top of the bulkhead kind of between the fusebox and the turbo. It is the on with a plug going into it and 3 small vacuum lines. If you follow the vacuum line from the top of the turbo, it plugs in to the N75 valve With regards to fuel filter, it not along since you've replaced it, so not sure. Did you make sure you cleaned the fuel filter housing of all fluids before you put the new filter? Water tends to collect at the bottom. __________________ Current car: 2002 S40 1.9D, 1992 240SE Nullius in Verba

Nov 18th, 2020, 10:49	#6
gatos Premier Member Last Online: Nov 15th, 2022 21:34 Join Date: Apr 2010 Location: London / Essex	Excellent. Nice and easy fix and it didn't break the bank. Glad I could help __________________ Current car: 2002 S40 1.9D, 1992 240SE Nullius in Verba

Nov 15th, 2020, 10:01	#3
lynns hubby Master Member Last Online: Today 11:15 Join Date: Oct 2011 Location: Great Yarmouth	I couldn't see it being anything dash related but you know what its like when its not your car and you have done something and then something else goes wrong !!!!!! Trying to explain it to other people is not easy. Yesterday I removed both intercooler hoses and the turbo inlet hose. There is definitely no issues there. I did remove the EGR solinoid which is free, the little plunger moves freely against the spring pressure. As you know, the actual EGR valve does not lend itself to being removed easily and as I had no spare I left it in place, however this also moves freely with no issues and was not clogged so I am confident the issue is not with this. When my daughter brings the car round next, I will try unplugging the MAF. What is this N75 valve you talk about and where can I find it. The other thought at the front of my mind is the fuel filter. This was changed in April and I would have expected a slow deterioration in power not just from stopping the engine and then restarting it after completing the vent change. Thanks for you help

Nov 18th, 2020, 09:34	#5
lynns hubby Master Member Last Online: Today 11:15 Join Date: Oct 2011 Location: Great Yarmouth	Just to let you know, it was the Turbo boost control valve. It took a couple of days to get one so only fitted it last night and car is back to normal again😀 Didn’t want to reply until We were sure. Thanks for your help.

Nov 18th, 2020, 11:35	#7
lynns hubby Master Member Last Online: Today 11:15 Join Date: Oct 2011 Location: Great Yarmouth	£57 inc VAT took some finding! Even Volvo didn’t have a part number. I managed to get a number from the old one and my local factors got one for me. I used them as if it was wrong they would have took it back😀

Nov 18th, 2020, 13:13	#9
lynns hubby Master Member Last Online: Today 11:15 Join Date: Oct 2011 Location: Great Yarmouth	I will get it later and let you know. I am sure it is used for VWs and obviously Renault as it’s their engine

Nov 23rd, 2020, 17:48	#10
lynns hubby Master Member Last Online: Today 11:15 Join Date: Oct 2011 Location: Great Yarmouth	Pat Nos as read from the new part. 7.21903.44 20T220 Sorry for the delay. Been waiting for my daughter to reply with the info. Hope this helps for anyone else looking. As I said earlier, neither my local dealer or FRF could help with a part number.

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