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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

9th Sep 2016 6:43am

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

9th Sep 2016 7:12am

vaucluse

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

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

9th Sep 2016 8:37am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17368

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.

9th Sep 2016 10:21am

vaucluse

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

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

9th Sep 2016 10:50am

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20340

Is your EGR valve working?

9th Sep 2016 11:42am

vaucluse

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

yes no issues with EGR

9th Sep 2016 12:38pm

Eau02467

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

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.

9th Sep 2016 7:48pm

Eau02467

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

Also another cause can be sticking turbo actuator

9th Sep 2016 7:49pm

vaucluse

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

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

9th Sep 2016 9:03pm

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