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gav525



Member Since: 25 Oct 2018
Location: Co Down
Posts: 19

United Kingdom 2006 Range Rover Vogue 4.4 V8 Java Black
Revs drops to nearly zero?

Another thing bugging me with my RR and thought i'd ask here in case anyone has experienced similar. Have tried searching but not bringing much up.

When in P or N, if I rev the engine slightly the revs drop right down before steadying at normal idle. A couple of times they have dropped so low then engine cut out. I also get this under braking, say when coming to a stop at a junction with the pedal pressed. Luckily it has never cut out in this instance though.

Any ideas before I start pulling things apart? Vacuum leak or MAF issue maybe?

Its an 06 AJ 4.4 V8 by the way.

Post #502826 26th Jan 2019 9:35am
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

Dirty MAF

Post #502833 26th Jan 2019 10:19am
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gav525



Member Since: 25 Oct 2018
Location: Co Down
Posts: 19

United Kingdom 2006 Range Rover Vogue 4.4 V8 Java Black

Will be the first thing to check when I get home next week then, cheers Thumbs Up 2006 Vogue 4.4 AJV8

Post #502838 26th Jan 2019 11:16am
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fisha



Member Since: 25 Sep 2009
Location: Scotland
Posts: 1218

2015 Range Rover Autobiography SDV8 Aruba

MAF + 1 V8 or else ...

Post #502896 26th Jan 2019 9:11pm
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Cam-Tech-Craig



Member Since: 03 Aug 2011
Location: Gloucestershire
Posts: 16146

England 2015 Range Rover SVAutobiography SDV8 Loire Blue

MAF + 3 Thumbs Up

Good shout James Thumbs Up

Post #502914 26th Jan 2019 11:32pm
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gav525



Member Since: 25 Oct 2018
Location: Co Down
Posts: 19

United Kingdom 2006 Range Rover Vogue 4.4 V8 Java Black

Cheers all for the above advice. Back in the UK now for a month so have the time to look at things properly now.

I fitted a new MAF sensor today but still have the same symptoms.

Any other ideas? Vacuum leak maybe? 2006 Vogue 4.4 AJV8

Post #503705 2nd Feb 2019 5:53pm
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3035

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

Air filter dirty/blocked?

Injector issue?

Fuel pump/ filter?

Post #503707 2nd Feb 2019 6:06pm
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gav525



Member Since: 25 Oct 2018
Location: Co Down
Posts: 19

United Kingdom 2006 Range Rover Vogue 4.4 V8 Java Black

Will check air filter and intake tomorrow. Will be giving it a full service soon so will stick a new fuel filter in and check pump and injectors also.

It's not the end of the world like, just don't like the revs dropping so low that it nearly stalls. Would hate for it to cut out coming up to a junction or whatever. 2006 Vogue 4.4 AJV8

Post #503722 2nd Feb 2019 7:30pm
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GraemeS



Member Since: 06 Mar 2015
Location: Wagga area
Posts: 2276

Australia 2012 Range Rover Autobiography TDV8 Bournville

I don't know the engine but that sort of behaviour is typical of a sticky idle control valve.

Edit: No idle control valve, just electric throttle so not likely to be sticking.

Post #503724 2nd Feb 2019 7:36pm
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Rovah



Member Since: 12 Apr 2018
Location: MO
Posts: 5

United States 2005 Range Rover HSE 4.4 V8 Java Black

Dolphinboy wrote:
Air filter dirty/blocked?

Injector issue?

Fuel pump/ filter?

Have you figured out a cause and solution for the rpm drop?

Post #507090 3rd Mar 2019 4:15am
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gav525



Member Since: 25 Oct 2018
Location: Co Down
Posts: 19

United Kingdom 2006 Range Rover Vogue 4.4 V8 Java Black

Nope, I'm back at work for a month so haven't had a chance yet.

When I get home end of March it'll be getting a post winter service and a few other wee jobs so will look at it then and see if I can figure out what's up. 2006 Vogue 4.4 AJV8

Post #507092 3rd Mar 2019 7:21am
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crowebeard



Member Since: 19 Dec 2016
Location: Devon
Posts: 93

United Kingdom 2012 Range Rover Westminster 4.4 V8 Orkney Grey

I have had exactly the same problem with the revs nearly dropping to zero, as well as the car stalling on start up when when the engine was warm. It turned out that my vacuum system wasn't connected correctly and air was being sucked straight into the inlet manifold through the PCV valve.

If you've got the AJ-V8 then this may be of no use, but on the BMW M62 there are 2 small connections on the PCV valve (indicated by the yellow arrows below)




Normally these should be both blanked off. If fitted with LPG, then the vacuum connection to the LPG system (after the vapouriser) should be plugged on to the left hand one. If it's an early vehicle (2002/3?) then the right hand one will be connected to the SAI as per the RAVE.

Mine now seems to be running normally and as an added bonus I haven't seen the Lambda control adaption fault bank 1/2 fault codes since I reconnected the LPG pipe that had come off. David

2012 Range Rover Westminster 4.4TDV8
2004 Range Rover Vogue 4.4 V8 (LPG) (Not quite gone)
2021 Mazda CX-5
2003 Porsche Boxster

Post #507198 3rd Mar 2019 7:34pm
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gav525



Member Since: 25 Oct 2018
Location: Co Down
Posts: 19

United Kingdom 2006 Range Rover Vogue 4.4 V8 Java Black

Mine is the AJ V8 but I'll be taking a good look at the vacuum system anyways. 2006 Vogue 4.4 AJV8

Post #507268 4th Mar 2019 10:02am
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Walkeraj101



Member Since: 25 May 2019
Location: Wirral
Posts: 3

United Kingdom 2007 Range Rover Vogue SE TDV8 Zermatt Silver

Hi, bit of a late response but I had this issue on my M62 4.4 v8 and it was MAF and diaphram had split inside the crankcase breather on back of air intake manifold. Had to replace both and all was good after that.

Post #521824 15th Jul 2019 9:13pm
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RR2008HSE



Member Since: 06 Jan 2013
Location: British Columbia
Posts: 2932

Canada 2008 Range Rover HSE 4.4 V8 Java Black

Had same issue. Turned out the MAF and throttle body were both dirty.

Post #522929 27th Jul 2019 12:40am
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