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MK

Member Since: 28 Aug 2008
Location: Santiago
Posts: 2414

2007 Defender 110 Puma 2.4 SW Chawton White

Very common for high P pump, VCV and pilot injection calibrations to fail. I am not sure I would trust the Launch tool for this vehicle. Does it throw any DTCs?

Is the VCV a genuine LR part sourced from a dealer or came in a Denso box? Same question for all the parts you already changed. By the way a faulty VCV seems not to throw any DTC. Puma 110" SW

.............................................................
Earth first. Other planets later

14th Jul 2024 3:07pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20314

Bear in mind the VCV when replaced doesn't need learning or programming.

It will shortly self learn by itself.

(Just posting this, as it can often be unknown by those who may want to replace their VCV). ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️

14th Jul 2024 4:37pm

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

land 0068 japan wrote:
Thank you everyone for your valuable comments. The tester I'm using is the X431. I've only been able to calibrate the 2.4 TDCI when I replaced the fuel vapor valve and when I calibrated the injectors. However, sometimes I can do that calibration and sometimes I can't. For now, I'll try replacing the air mass sensor.

I would start disconnecting the plug from the MAF first and see what happens, replacement values will then be used.

15th Jul 2024 1:03pm

land 0068 japan

Member Since: 27 Jun 2024
Location: kanagawa
Posts: 10

2007 Defender 110 Puma 2.4 USW Keswick Green

land 0068 japan wrote:
Thank you everyone for your valuable comments. The tester I'm using is the X431. I've only been able to calibrate the 2.4 TDCI when I replaced the fuel vapor valve and when I calibrated the injectors. However, sometimes I can do that calibration and sometimes I can't. For now, I'll try replacing the air mass sensor.

I replaced the air mass sensor (MHK501040) and MAP sensor (LR022164), but the symptoms did not change. What else could be the cause? In the end, the EGR (LR006650), main computer, and security box were the three main problems.

26th Jul 2024 3:41am

land 0068 japan

Member Since: 27 Jun 2024
Location: kanagawa
Posts: 10

Today, I replaced the main computer and security box (green) parts and test drove the car, but the symptoms did not change. I replaced the air flow sensor with a new aftermarket part (made by Intermotor) and the MAP sensor with one from another vehicle, but the symptoms did not improve. I cannot find any more parts to replace. Is there anything else I can think of that might improve things?

26th Jul 2024 8:58am

MK

Member Since: 28 Aug 2008
Location: Santiago
Posts: 2414

So, you still have the very same symptoms? What are the DTCs? Puma 110" SW

.............................................................
Earth first. Other planets later

26th Jul 2024 12:57pm

land 0068 japan

Member Since: 27 Jun 2024
Location: kanagawa
Posts: 10

The details of the symptoms are: water temperature 90 degrees, when I press the accelerator pedal all the way to accelerate, the engine will choke for a moment. Even after that, when I try to accelerate, the engine chokes intermittently and stalls. The engine check light is not on, and there are no fault codes as far as I can see with a tester.
I've replaced and cleaned all the fuel system and sensors, but the symptoms have not improved at all.

Excuse me. What does DTC mean?

27th Jul 2024 1:11am

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