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Defender du

Member Since: 20 Feb 2024
Location: Wales
Posts: 17

2011 Defender 90 Puma 2.4 PU Santorini Black

Intermittent power power loss 2.4tdci

Having problems again!!!
Intermittent loss of power when warmed up ticks over fine starts fine after but struggles to rev over 2-3k like fuel starvation when more fuel is needed.
Some things done over past couple of years:
New fuel pump
New injectors
New egr
New map and maf
New fuel filter holder
New timing chain.
Silicone hoses

Happens out of the blue just kangaroos then slows down wont rev above 2-3k rpm then seams to clear after a few minutes, puff of black smoke at times and when it is doing this.

16th Nov 2024 9:19pm

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 1990

Have you changed the VCV ? Do you get any Diagnostic Trouble Codes (DTC’s).

16th Nov 2024 10:01pm

Defender du

Member Since: 20 Feb 2024
Location: Wales
Posts: 17

Vcv would of been changed a couple of years ago, not getting erratic tick over so thought it would not be VCV as it sits well on tick over.

16th Nov 2024 10:06pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17353

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Check for DTCs and if none change the VCV.

16th Nov 2024 10:42pm

Defender du

Member Since: 20 Feb 2024
Location: Wales
Posts: 17

Thanks have got one on standby after lastime👍

Last edited by Defender du on 17th Nov 2024 7:26am. Edited 1 time in total

17th Nov 2024 6:48am

Defender du

Member Since: 20 Feb 2024
Location: Wales
Posts: 17

Click image to enlarge
These are the Dtc

17th Nov 2024 7:25am

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 1990

Given you have changed the injectors and the fuel filter, what’s the wiring like to the injectors ? as I’m thinking the P121C code is pointing to the culprit.

17th Nov 2024 4:07pm

Defender du

Member Since: 20 Feb 2024
Location: Wales
Posts: 17

Thanks Ian will have a look👍👍

17th Nov 2024 4:28pm

Trev

Member Since: 01 Jul 2023
Location: Fife
Posts: 8

2008 Defender 110 Puma 2.4 USW Zermatt Silver

I had a similar issue with mine, I would be trundling along and it would just lose power and acceleration would be extremely sluggish. If I pulled over, switched the engine off then on again the problem would go away for a while. In my case it was the turbo actuator that was at fault.

17th Nov 2024 9:03pm

Defender du

Member Since: 20 Feb 2024
Location: Wales
Posts: 17

Actuator seams ok have been putting some light oil for a few months and there is movement. The problem happens when you put your foot down and it is like limp mode. If I pull over and try to rev struggles to go above 2000rpm.

17th Nov 2024 9:22pm

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