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Grenadier



Member Since: 23 Jul 2014
Location: The foot of Mont Blanc...
Posts: 5765

France 2011 Defender 110 Puma 2.4 DCPU Corris Grey
Fuelling problem on 2.4
Morning all.

Fuelling problem. Need to know what to look for.

Start up is normal. Can be a big puff of smoke if cold.
During warm up idle, engine hunts. Can get really bad.
Eventually calms down but when heading off and pressing accelerator, unless really over-revving, fuel feeds cuts dramatically, if not stall. Certainly there's seriously lag and hunting. To almost zero. This game goes on until the engine is warm.
Then, if driving at steady revs (2000) on straight road, it's OK. Not super responsive but OK.
On roads with traffic lights and roundabouts, can be normal when warm (certainly when driving) but when pulling away from lights, jncs or roundabouts, can sometimes feel like it's cutting out or almost going into limp mode.

What thoughts?

VCV?
Pump?
Something to do with the accelrator?
Other?

Am in UK. Don't want to get stuck here.

Ta Monsieur Le Grenadier

I've not been everywhere, but it's on my list.....

2011 Puma 110DC - Corris Grey
Post #947478 30th Mar 2022 7:30am
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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2579

South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
I'd start with the VCV --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



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Post #947489 30th Mar 2022 8:38am
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hank



Member Since: 12 Sep 2016
Location: South Wales
Posts: 2218

Wales 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
With the engine running, disconnect each injector connector one at at a time then reconnect.

Unplugging an injector will obviously cause the engine to run on three cylinders which will be noticeable. If you unplug an injector but do not note any difference in running then that injector is faulty.

Costs nothing and takes two minutes to rule out injectors.

I had running issues with mine for months. Did the Mass Air Flow Sensor and VCV but it turned out to be a faulty injector on cylinder 4 as per https://www.defender2.net/forum/topic53240-217.html > 110 XS Double Cab
> Instagram @simonlanemind
Post #947496 30th Mar 2022 8:52am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
Definitely go for the VCV first, put a little light oil like 3 in 1 on your turbo actuator pivots too.

If you have no clutch switch DTC’s it won’t be that, so maybe as mentioned above.
When was the fuel filter last changed?

If you don’t already use Millers diesel additive, it may help and you can use it permanently anyway like I do. 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 #947534 30th Mar 2022 4:37pm
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spudfan



Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4430

Ireland 
Yep out 2.4 used to surge forward and a change of the VCV sorted. It was just fitted without any relearning process. Opinion is divided on this but mine was just installed and everything worked fine. A main dealer would probably say that the vehicle needs connecting to their computer for a relearn. They charge for this..... 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 #947757 1st Apr 2022 7:21pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
Same here Spud, VCV straight in and working perfectly.

In response to the OP I just thought of, clean the MAF and MAP that may be worth doing as well. 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 #947763 1st Apr 2022 7:28pm
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spudfan



Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4430

Ireland 
Yep, do the simple stuff first. Anything you can get out,get it out and clean it. 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 #947768 1st Apr 2022 7:39pm
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Grenadier



Member Since: 23 Jul 2014
Location: The foot of Mont Blanc...
Posts: 5765

France 2011 Defender 110 Puma 2.4 DCPU Corris Grey
Thank you all. Yup, VCV. Kindly changed by Chris at CSK in just 20mins. For those who’ve wondered, no re-learn required. Now drives like a dream. Looking forward to throwing in the new BAS Intercooler and hoses, and getting the remap done Thumbs Up Monsieur Le Grenadier

I've not been everywhere, but it's on my list.....

2011 Puma 110DC - Corris Grey
Post #948121 5th Apr 2022 7:01am
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