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vaucluse



Member Since: 04 Feb 2012
Location: SE London
Posts: 185

2007 Defender 110 Puma 2.4 SW Java Black
2.4 Puma Engine Surging
Having an issue recently when I change gear the engine revs surge (not to be confused with holding revs). This seems to happen intermittently but generally around 2700 revs.

Any ideas what could be causing this?

Cheers

Mark
Post #562632 9th Sep 2016 6:43am
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hornet



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

First thing you should do is check fuse of brake-light. If thats fine, read
http://www.defender2.net/forum/topic579.html

Feedback appreciated
Post #562637 9th Sep 2016 7:12am
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vaucluse



Member Since: 04 Feb 2012
Location: SE London
Posts: 185

2007 Defender 110 Puma 2.4 SW Java Black
Hello Hornet,

Thanks for your reply. I have read your linked thread but can say it's not the same issue. This is a very recently occurring issue and is intermittent (50-60% of the time). Clutch switch replaced yesterday and it's still happening.

Mark
Post #562654 9th Sep 2016 8:37am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17369

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Any DTCs?

This could be a VCV fault. VCV faults can cause many strange symptoms, usually without DTCs.
Post #562670 9th Sep 2016 10:21am
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vaucluse



Member Since: 04 Feb 2012
Location: SE London
Posts: 185

2007 Defender 110 Puma 2.4 SW Java Black
Hi Blackwolf,

Vcv was replaced also and it's still surging - no faults registered.

Interestingly it's only occurring in the 2500 to 2800 rev range.

M
Post #562681 9th Sep 2016 10:50am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20341

United Kingdom 
Is your EGR valve working?
Post #562687 9th Sep 2016 11:42am
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vaucluse



Member Since: 04 Feb 2012
Location: SE London
Posts: 185

2007 Defender 110 Puma 2.4 SW Java Black
yes no issues with EGR
Post #562700 9th Sep 2016 12:38pm
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Eau02467



Member Since: 20 May 2015
Location: Glasgow
Posts: 48

Scotland 
It sounds like clutch switch but given you have replaced it i would look at other things in same area. Is the wiring to switch intact? Also When was the clutch fluid last replaced? Old fluid may not be holding up to hydraulic pressure and not activating the switch.
Post #562802 9th Sep 2016 7:48pm
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Eau02467



Member Since: 20 May 2015
Location: Glasgow
Posts: 48

Scotland 
Also another cause can be sticking turbo actuator
Post #562803 9th Sep 2016 7:49pm
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vaucluse



Member Since: 04 Feb 2012
Location: SE London
Posts: 185

2007 Defender 110 Puma 2.4 SW Java Black
Clutch fluid was changed last month.

Will need to check the turbo actuator - was thinking along those lines and also need to check the turbo modulator harness whilst I'm at it.

Thanks

M
Post #562829 9th Sep 2016 9:03pm
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