 | Home > Technical > Fuelling problem on 2.4 |
 
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5889   
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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 |
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30th Mar 2022 8:30am |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2669  
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I'd start with the VCV --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear 2015 Range Rover Sport V8 Supercharged 
Defender Puma Workshop Manual: https://bit.ly/2zZ1en9 Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ |
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30th Mar 2022 9:38am |
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| hank Member Since: 12 Sep 2016 Location: South Wales Posts: 2325  
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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 |
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30th Mar 2022 9:52am |
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| spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4789 
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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 |
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1st Apr 2022 8:21pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20788 
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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. WeWillWin🇬🇧🇺🇸 ⛽️🛢️⚙️🧰💪 |
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1st Apr 2022 8:28pm |
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| spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4789
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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 |
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1st Apr 2022 8:39pm |
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5889
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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
 Monsieur Le Grenadier
I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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5th Apr 2022 8:01am |
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