 | Home > Puma (Tdci) > Loss of Power - VGV question |
 
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20638  
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Yes, do you know how old it is?
It would be useful to plug it in to check for any fault codes. (DTC’s). Bearing in mind the VCV doesn’t produce any but MAF and other items do. Might be worth cleaning the MAP and MAF sensors too. I got my VCV from PF Jones diesel specialist, the part fits various models mine came in a Nissan genuine box. The part was brand new, fitted and really good. The biggest different you’ll notice is high end power restored. You are probably getting some fuel starvation at higher speeds hence the issues you’ve had. It will get worse and can just cut right out, especially dangerous at junctions and roundabouts as this happened to me twice. No programming required once fitted, however, I would recommend to disconnect battery first before working on it which is good practice. There is a two stage tightening process of the fixings in the WSM with torque settings if you can get that, or it’s may be on here or it can be looked up for you. If you would like to not do that or you don’t have the tools. Just don’t over tighten, they are just nipped up. Not loose, but don’t over tighten tighten. Just secured. IIRC is was 8nm max possibly 6nm, but don’t quote me on that, it’s a relatively simple job and the electrical connector is best removed once the part is removed for ease of access. Worth having a bit of paper / kitchen towel and disposable gloves if you have any lying around too. I find mine is running very sweet now, full power is restored and you will notice the difference.  TheThunder Rolls🇬🇧🇺🇸
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3rd Apr 2021 4:50pm |
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| boxoftricks Member Since: 06 Feb 2019 Location: Home Counties Posts: 747 
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Thanks Steve
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3rd Apr 2021 7:48pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8172  
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Don't rule out turbo. Does it reset with an ignition cycle? Cheers
James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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3rd Apr 2021 10:48pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20638
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James is right above, so worth doing some checks but seeing as the VCV is relatively cheap it’s worth doing and can then be ruled out if it isn’t the issue in the end.
Good luck. TheThunder Rolls🇬🇧🇺🇸
⛽️🛢️⚙️🧰💪 |
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4th Apr 2021 7:46pm |
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| boxoftricks Member Since: 06 Feb 2019 Location: Home Counties Posts: 747
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Yes re-sets its self with the ignition cycle so think its temp related, not thankfully the turbo |
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6th Apr 2021 4:45pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8172
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Does it always happen after coming off boost only? Cheers
James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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6th Apr 2021 8:09pm |
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| CharlieDonuts Member Since: 16 Jun 2019 Location: Illiers Combray Posts: 133  
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I have the same problem. It only happens rarely. Temporary fix is to switch the ignition off and on again. So I am following with some interest.
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7th Apr 2021 9:21am |
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| BIMbound Member Since: 09 Jan 2021 Location: UK Posts: 44 |
Similar problem here, same engine, same mileage. I think mine is turbo related as when the power goes there is no longer that distinctive whistle from the turbo. Engine off and cool down - off we go again.
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7th Apr 2021 11:57am |
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| boxoftricks Member Since: 06 Feb 2019 Location: Home Counties Posts: 747
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I've spoken to the guys at Bass tuning and need to wait until it happens again and plug in the code reader before turning off the ignition. Will keep you posted
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7th Apr 2021 1:04pm |
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| Minch90 Member Since: 15 Sep 2017 Location: Gloucestershire Posts: 236
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My fix was - new fuel filter (full of crap, so fixed breather pipe first), foamy turbo cleaner thru turbo and a new vcv. No probs since, and was occurring every few days beforehand. Prob belt and braces but covered all bases for me 👍 2.4TDCI 90 - everyday brilliance
S3 V8 Lightweight - in the garage being ignored #newchassistime S3 lightweight - 2nd car 24V fire risk with a full tilt and the windscreen down S1 80" - first car fun - 75mph in neutral downhill once #wobblesallround |
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7th Apr 2021 1:34pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8172
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i have had the fuel tank breather issue, but that cures itself once you have slowed down and some air has made its way into the tank then it goes again.
i think you have a turbo overboost register issue which is going to limp mode, assuming it does it after a longish session on full load/boost. try holding it under full boost for 5 to 10s, ie uphill on a motorway and see if it does it. Cheers James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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7th Apr 2021 7:09pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20638
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Is the actuator operating smoothly too? TheThunder Rolls🇬🇧🇺🇸
⛽️🛢️⚙️🧰💪 |
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7th Apr 2021 8:16pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8172
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^^^ i expect it is moving but not responding quick enough when coming off power and pressure ouput correlation is lost. Cheers
James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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7th Apr 2021 8:21pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20638
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That makes lot of sense.
I tend to put a drip or two of oil on mine (turbo actuator) every once in a while. Like 3in1 oil in a dropper bottle.
Only very little though for obvious reasons and seems to keep mine in good order. TheThunder Rolls🇬🇧🇺🇸 ⛽️🛢️⚙️🧰💪 |
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7th Apr 2021 8:46pm |
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