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spudfan



Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4425

Ireland 
On a slight tangent here but oddly enough a not dissimilar problem. It's about my sex life. Same symptoms...... Whistle 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai
Post #846764 28th Jul 2020 8:45pm
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thr



Member Since: 17 Sep 2008
Location: Warwickshire
Posts: 33

2011 Defender 110 Puma 2.4 DCPU Cairns Blue
Thanks you for all the ideas.


bear100 - I took the MAP sensor out yesterday and it does look a bit sooted up. I am waiting for some more contact cleaner to arrive today. Fingers crossed. The tempreture guage rises margingally when i first turn on, and then goes up as per normal as i drive on the times that it actually starts. It deosn't show the issue of rocketing up that other people have seen.

Wyvern - It is happening with only one set of keys in the car, and it doesn't appear to matter which set i use. Funnily when i drove it home from collecting it i had both sets of keys in the car, but didn't have any problems. I probably just had the second set far enough away.

Dinnu - Will check the crank position sensor is clean and tight.

I also have a vcv arriving today if the above don't work. After reading all the posts on here it seams like a good spare to have. Looking at where it is, and reading a how to change it guide, i am not looking forward to that job.
Post #846791 29th Jul 2020 6:50am
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thr



Member Since: 17 Sep 2008
Location: Warwickshire
Posts: 33

2011 Defender 110 Puma 2.4 DCPU Cairns Blue
Sorry Spudfan, i missed you off the response. No i am not seeing those symptoms at present, but will keep an eye out for them.
Post #846794 29th Jul 2020 6:57am
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thr



Member Since: 17 Sep 2008
Location: Warwickshire
Posts: 33

2011 Defender 110 Puma 2.4 DCPU Cairns Blue
Today I cleaned the MAP sensor, which was very sooty. Sadly this didn't solve the problem.

A new VCV arrived. When I removed the old one the O-ring half way down the shaft was perished with the edge coming off, and the socket was wet.

I fitted the new one, but then it would crank but not start, I checked there were no loose cables, that all the seals were seated correctly but I couldn't get it to run. It appeared to be a cheap copy. I have ordered a denso one, so hopefully that will improve things. I fitted the old one back in and went back to the prior status of started then stalling.

Here is a video in case someone spots something else. There are two attempts. The first with no throttle input. The second with a constant throttle input, although you will see the engine hunting.



10 mins I tried again and it started and drove fine.
Post #846906 29th Jul 2020 6:08pm
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spudfan



Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4425

Ireland 
It could be a fill up with bad fuel. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai
Post #846946 29th Jul 2020 9:33pm
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3140

Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
Curious to know what was the root cause if problem has been solved. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #849578 12th Aug 2020 4:48pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 7664

2011 Defender 110 Puma 2.4 USW Stornoway Grey
Vcv gets my vote. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop
Post #849579 12th Aug 2020 4:57pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19449

United Kingdom 
I had this last year once, it was the VCV on its way out but occurred after using a different fuel station which I no longer use.
I wonder if there was something up with it, went back to Esso where I normally went and it never did again but I’ve changed the VCV since.

Lower MPG, poor throttle response and feeling laggy and down on power are typical. And rev hunting in very cold weather. 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 #849581 12th Aug 2020 5:01pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 7664

2011 Defender 110 Puma 2.4 USW Stornoway Grey
Just to add I had a non branded vcv arrive and vehicle wouldn't start either, so your not alone. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop
Post #849631 12th Aug 2020 8:29pm
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thr



Member Since: 17 Sep 2008
Location: Warwickshire
Posts: 33

2011 Defender 110 Puma 2.4 DCPU Cairns Blue
It is still not solved unfortunately. The vcv was changed as the seal was damaged anyway.

It has been with EH Douglas near Banbury for the last week. Day 1 it was serviced and passed its MOT. Day 2 they went to fiddle with some other things and it wouldn't start. As soon as they find the answer i will post it on here.
Post #849728 13th Aug 2020 11:56am
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 7664

2011 Defender 110 Puma 2.4 USW Stornoway Grey
intriguing Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop
Post #849743 13th Aug 2020 12:50pm
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thr



Member Since: 17 Sep 2008
Location: Warwickshire
Posts: 33

2011 Defender 110 Puma 2.4 DCPU Cairns Blue
The defender is back from the garage. The diagnostics they ran showed a cam shaft issue. They changed the sensor and it appears to be fixed, or rather after three starts it has not given me any problems yet. Lets see how the next few weeks go with my fingers crossed.
Post #850015 14th Aug 2020 8:00pm
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spudfan



Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4425

Ireland 
Thumbs Up 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai
Post #850017 14th Aug 2020 8:02pm
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thr



Member Since: 17 Sep 2008
Location: Warwickshire
Posts: 33

2011 Defender 110 Puma 2.4 DCPU Cairns Blue
Just a quick update five days later that the problem still appears to be solved. As with others i probably won't be 100% certain until it has started first time 100 times, but so far so good.

Thank you to everyone on the forum for all the information and help.
Post #850871 19th Aug 2020 10:11am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16807

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Thanks for posting the update, it is always useful to hear what the solution to a problem was since it builds the collective knowledge.

An intermittent signal from the camshaft sensor would certainly cause this problem, although failures of this sensor are relatively rare. As I recall, it is actually only used during the start-up sequence to allow the ECM to differentiate between the exhaust and compression strokes of No 1 cylinder and hence determine the synchronisation for the injectors.

The crankshaft sensor output is of course ambiguous since it will indicate No 1 TDC every revolution, irrespective of the stroke. Once the engine is running, the camshaft sensor isn't needed until the next start-up.
Post #850892 19th Aug 2020 12:10pm
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