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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5804   
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Morning all. I think my post is about a well covered subject, and indeed I have searched for answers on-line, but it is very muddled and I am therefore keen to tap into the oracle that is the combined intellect of the Def2 forum’s membership.
I have suffered a loss of power in the DCPU over recent days. Nearly all occasions have been identical: After driving for a while without problem, i head up hill at a steady pace before eventually needing to drop a gear either due to a junction or extra steepness in the hill. At the point I drop gear and accelerate, there’s a sudden (but not complete) loss of power. First time it happened, felt like a fuel feed block/failure. I drive slowly for a bit and then it picks up again. It has happened five times since I picked her up from Palma last week, the first being during the drive home on Thurs night. All occasions have been almost identical. Hill, drop gear, reaccelerate. Facts worth knowing: 60k on the clock Never ever happened before in 18mths of ownership Engine Management light is ON. Not had a chance to read fault codes. Cleaned MAF Sensor before my Palma trip. Has done approx 1500 KMs since. External Air Temp has been ‘normal’. Max 25c. All occasions have been on hills driving at normal speed, revs around 2500 When the DCPU had its output shaft replaced in Palma, I slipped in a new Fuel Filter as well (cause?) I have heard of the following reasons: Dirty fuel filter or blocked fuel line. Misreading airtemp gauge in airbox Dodgy MAF sensor Blocked Intercooler Leaking Intercooler Split hoses Failed Turbo actuator Failed Turbo I know others have had similar experiences, can anyone point me in the logical order to check things. I appreciate the first will be the Fault Codes which I hope to do tomorrow. I shall give the MAF sensor a clean this morning, check the airbox and ensure the Intercooler is clean and clear of crud. I will externally inspect the Turbo for any signs of wear, damage, and pipes for leaks etc. Will keep all posted, but any initial thoughts welcome.  Monsieur Le Grenadier
I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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29th Aug 2018 6:10am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17372  
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VCV
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29th Aug 2018 7:12am |
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5804
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Thanks BW. Easily recitified? Cheap/expensive? DIY/Garage? Monsieur Le Grenadier
I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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29th Aug 2018 8:03am |
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5804
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Thanks BW, will get the fault readings done tomorrow and make a plan. Sounds like a sensible fix anyway for a 60k engine. (BTW, good advice on the clutch change when I did the outpt shaft, no more than a few hundred miles left in it).
As an update, cleaned the MAF, drove to work. I kept the revs steady and pre-planned gear changes. Main uphill stretch is 14km dual carriageway at an average of 5-7%, which I travelled at 90-95kmh, 1800-2000rpm. No slump in power. Heading home at midday, which includes a shorter, sharper and steeper hill of 3kms just before home. Will update. Monsieur Le Grenadier
I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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29th Aug 2018 9:41am |
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| agentmulder Member Since: 16 Apr 2016 Location: Outer Space Posts: 1324 
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Concur  Solved the bowel problem, working on the consonants... |
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29th Aug 2018 11:16am |
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| shropshiredefender Member Since: 05 Jun 2017 Location: Shropshire Posts: 834  
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Based on personal experience Blackwolf is almost certainly right - VCV.
It is worth checking the coolant level because if the Cylinder Head Temperature Sensor detects overheat it will cut engine power momentarily. The CHT will react before the temp gauge moves and it does feel like a fuel related issue. Be lucky |
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29th Aug 2018 11:54am |
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5804
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Is this what we're talking about?
https://www.firstfour.co.uk/vacuum-pump-fo...i-oem.html Monsieur Le Grenadier I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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29th Aug 2018 12:17pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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No, that's a vacuum pump. You're looking for a Volume Control Valve (VCV).
 Click image to enlarge Darren 110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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29th Aug 2018 12:27pm |
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5804
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Ta.
Monsieur Le Grenadier
I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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29th Aug 2018 12:42pm |
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| o4dn Member Since: 08 Jan 2010 Location: South West Posts: 538 
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Just a bit of warning though, that picture and reference on the box are the VCV for a 2.2 Puma whereas Grenadier's is a 2.4, the VCV differs between the two. The VCV for a 2.4 Puma should be: Landrover: LR009837 Ford: 1 514 885 (6C1Q 9358 AB) I changed mine a couple of months ago, took me a lot more than 10 mins though, it was pain of a job to be honest, maybe it's a easier on a RHD (mine being a LHD), dunno... On the plus note, the car is working so much better now... “A Land Rover immobilized is a moral defeat for the driver and bad publicity for the vehicle, […] it's up to you to do justice to your Land Rover!” - Land Rover Driving Technique. -- 2009 2.4 Puma Defender 90 SW 1979 Land Rover Series 3 88" |
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29th Aug 2018 1:15pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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Good point. I just pinched it to illustrate how different it is to a vacuum pump! Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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29th Aug 2018 2:21pm |
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| williamthedog Member Since: 29 Dec 2012 Location: south wales Posts: 3441 
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If it is the vcv valve I found it relatively easy. I unclipped the wiring harness out of the way. Disconnected the vacuum hose out of the way. Unclip the wiring to the vcv when it's off the pump.
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29th Aug 2018 3:18pm |
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| Hairysteve Member Since: 15 Jun 2015 Location: Surrey Posts: 692 
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Are you by any chance noticing a bakery/pastry/sweet smell in the cabin? I ask because I had your symptoms and this sweet smell of coolant was another symptom and in the end was resolved by the head being skimmed. Sure that with your low mileage it isn't this but worthy of a share.
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29th Aug 2018 5:45pm |
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5804
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Update: Morning commute it happened a number of times in succession along a dual , but on this occasion, every time (three within a couple of clicks) the thermo shot up to full. Pulled over to cool down, then drove at a slower rate on an a-road to Cham. Would the VCV effect the temp or is this possibly more a coolant issue? Will check levels when engine is cold.
Monsieur Le Grenadier
I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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31st Aug 2018 8:18am |
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