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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
VCV Supplier
Does anyone have a link to a good supplier of a VCV for the 2.4 Puma that you've had sucesss with?

I've been keeping an eye on mine for some time, bit of erratic ideology on and off.
Today she started fine, got out onto the road not far away.
Went to pull out onto the main road clutch up and nothing, I thought for a second not the bloomin gearbox Output shaft.
It seemed like revs dropped right off although i didn't notice as it was so quick, then a surge of power and down the road I went as normal.
Could have been quite dangerous.
Then 1/4 miles down the road came to the roadabiut in traffic. Pulled up, went to move Of and she died on me. Shocked
Restarted there and then with hazards on quickly as traffic was right behind me quing, I think again is it the clutch or splined Output shaft.
Then drive on and she was fine and quite normal once warm, I haven't been driving it so often lately and it did it the other day when cold too,
Alough not stalled but a power surge, almost like a failed clutch switch but this isn't the issue with mine.
This has developed recently, so the bridged clutch switch isn't the issue fir mine as I've had that done for a good couple of years now with no problems.

I'm suspecting the VCV as fuel starvation.

I plugged in my diagnostics and picked up the following DTC's: (I'm aware the VCV doesn't thow up logged DTC's.)

P0606
P0100
P0234
P0704

I've looked these up codes myself, some of them are nuiscence the rest I think tend to happen.
I'm not over concerned about them.
Everything seems okay under the engine bay, only thing I noticed was a bit of oily residue around the hose entering the manifold that the MAP is fitted.
Is this a slight pressure / boost leak? (I'm not an expert, but it looked a bit like that.)


Click image to enlarge



All hoses seems fine, no splits or anything only the above, I have since tightened the clip on the hose a bit more it didn't seem loose but I did anyway and see how it goes.
When I re-fitted it would have been tightened to WSM torque spec.

I tend to think though the issue I've had is VCV related, and at this time of year as well.
She warms up as normal and otherwise runs perfect, however, it is quite dangerous the way in which she reacted today.

If anyone has any thoughts and a link to a suitable tried and tested part I'd be grateful, I think we are talking £50 - £70 approx?

Thank you. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #815685 17th Feb 2020 8:11pm
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Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3993

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
I bought a Denso VCV from PF Jones in Manchester. It’s done over 10k miles since I fitted it and still ok.

https://www.pfjones.co.uk/land-rover-defen...valve.html 2007 110 TDCi Station Wagon XS
Post #815718 17th Feb 2020 10:38pm
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keef9t



Member Since: 13 Mar 2016
Location: manchester
Posts: 168

United Kingdom 2007 Defender 90 Puma 2.4 HT Stornoway Grey
+1 for PF Jones
Post #815823 18th Feb 2020 4:58pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
Thank-you both. I will order that ASAP and see how I get on. There are good guides on here and I have the WSM to help also. Thumbs Up Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #815852 18th Feb 2020 6:42pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
Purchased this VCV today. (Thank you.)

My 90 has not done the same behaviour as it did on the day that I described where it had cut out.
But it has done this before in the past, rarely though and always in winter time when stone cold.

I’m on about 76k miles on original VCV.
She does seem a bit heavier on the juice lately too. Did anyone have this as a symptom at all?
As the part is fuelling related I’m sure it has a significant effect.
On this occasion I think the PRV will be okay as it is. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #818142 4th Mar 2020 3:58pm
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williamthedog



Member Since: 29 Dec 2012
Location: south wales
Posts: 3441

2011 Defender 90 Puma 2.4 PU Tamar Blue
It's easier enough to replace Steve. Move the wiring out of the way. Unclip the servo hose out of the vacuum pump to give yourself more room. Undo the 2 cap head bolts, pull the vcv valve out of the pump then disconnect the wiring last. About a 20 minute job. Dont worry about the pump relearn either. 👍
Post #818178 4th Mar 2020 7:21pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
Thumbs Up I think like most Puma motor related jobs the access is the most annoying thing.

I have the WSM details, and there are good threads on here about replacing it. Thumbs Up

What differences did you all notice once replaced? Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #818183 4th Mar 2020 7:42pm
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kmac



Member Since: 07 Oct 2009
Location: Middlesex
Posts: 1294

United Kingdom 2009 Defender 110 Puma 2.4 USW Santorini Black
Mine was losing power intermittently and rather dangerously.

Replacing the VCV fixed that

Didn't bother with the pilot re-learn ( even though I have a Nanocom)
Post #818259 5th Mar 2020 10:30am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
Thanks KMAC, it certainly seems likely to be the culprit and it's fairly sporadic too like you described.
Thumbs Up Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #818300 5th Mar 2020 3:45pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
I got the VCV fitted by myself today, I didn't disconnect anything in the end but was a real pain to get at regardless.
I used various different 1/4" and 3/8" extension bars when needed, 1/4" torque wrench and a 3/8" UJ.
A hex key with ball end was useful and also a 3/8" socket with hex key built in was needed.

I managed to do the two stage torque settings too whilst at it.
As advised before it was easier to leave the electrical connector on until the VCV was out, then disconnect.
When the new VCV was in, it was best to fit the Connector on last.

I did find the new fixings supplied were longer than the old ones, I carefull wound a new one in to see and wasn't quite sure if it would tighten up being longer and it still stood proud of the mating surface.
So I decided to use to original shorter fixings, they aren't highly stressed or under high torque so they will be fine.

I disconnected the battery beforehand.

On starting up she gave a tiny cough then ran perfectly.
Idle seems more smooth and throaty, went for a run although only about 5 miles.
Power seems up and responsiveness seems better, nothing huge but noticeable especially on pulling off I.e. From junctions or hill climbing.

I haven't looked at the old VCV yet, but no doubt I will sometime.

Pleased with that, thanks for the advice everyone. Thumbs Up

Should anyone need the torque specs there is a two stage tightening process:

1) 5NM OR 4 lb.ft.

2) 8NM OR 6 lb.ft.

I used an alcohol wipe to clean the mating surface, and pre cleaned the area with a microfibre (dry only.) before removing the old VCV.

Not a very good pic, but here's a photo of the old one coming out:


Click image to enlarge


I would say I was right that it did need changing, as there is a difference there.
76k miles I wouldn't complain at either, I'm sure it's original from the factory fit. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #819902 16th Mar 2020 8:23pm
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Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3993

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
If you have still got the old one and have time, would you take it apart? There is a circlip in the end that holds the piston in. I’d be interested to see if there is any scoring or discolouration on the piston. On mine there was, and I think it is this damage that causes the piston to get sticky in bore and not regulate smoothly. 2007 110 TDCi Station Wagon XS
Post #819910 16th Mar 2020 8:36pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
Yes, I certainly will do at some point. I have circlip pliers that should work.
Looking at the tip of it it does look like heat discolouration with a blue like hue.

I am presuming that it is this you are thinking of but I haven’t actually looked at it internally yet though.. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #819917 16th Mar 2020 9:07pm
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Badger110



Member Since: 06 Feb 2018
Location: South hams
Posts: 1024

United Kingdom 2011 Defender 110 Puma 2.4 USW Buckingham Blue
Mines on 154k and idle when cold is a little hesitant and hunting abit

i'll order one for when i do the timing chain soon Thumbs Up
Post #819924 16th Mar 2020 9:47pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19454

United Kingdom 
Today I had to go on a 50 mile round trip.

That gave me the oppertunity for a proper run with the 90.
I can definitely tell that there is an increase in performance and responsiveness and increased power top end.

I'm pleased with that outcome, I am pretty sure I can safely say it was the culprit of the issue I was having with the engine stalling when cold and rough idle etc. Smile

If you find any of these things to be an issue with no DTC's then the VCV could indeed be a culprit. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #820033 17th Mar 2020 8:29pm
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Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3993

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
custom90steve wrote:
Yes, I certainly will do at some point. I have circlip pliers that should work.
Looking at the tip of it it does look like heat discolouration with a blue like hue.

I am presuming that it is this you are thinking of but I haven’t actually looked at it internally yet though..


I think it is possibly a ground and hardened piece so the heat discolouring might be fine. On mine, when I took it out, there were faint striations down the length of it. 2007 110 TDCi Station Wagon XS
Post #820037 17th Mar 2020 8:51pm
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