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chex



Member Since: 17 Sep 2012
Location: E. Africa
Posts: 130

Kenya 
'lambda control adaption exceeds lower limit'

after a long drive my L322 M62 started bogging and I got the above error for both banks.

IIDtool live values gave me +/- 983ish for the values, any ideas on possible causes?

Exceeding the lower limit implies too much fuel and not enough air? I don't understand what would cause that. Bad MAF?

Air filter is AEM (2006 facelift means stock filter doesnt fit), could hot air be the problem?

Post #342797 16th Aug 2015 6:35pm
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Haylands



Member Since: 04 Mar 2014
Location: East Yorkshire
Posts: 8190

England 2014 Range Rover Autobiography SDV8 Loire Blue

I recon inlet manifold leak, has your PCV valve and associated pipework been changed (see WIKI) if not a leak somewhere else, even heard of the manifolds getting loose so check the nuts for tightness.... Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Post #342806 16th Aug 2015 7:05pm
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chex



Member Since: 17 Sep 2012
Location: E. Africa
Posts: 130

Kenya 

wouldnt an air leak cause it to exceed the upper limit?

Big PCV hoses changed but havent done the little ones or the seperator. Havent done the valve either.

Will check the manifold.

Post #342812 16th Aug 2015 7:19pm
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Haylands



Member Since: 04 Mar 2014
Location: East Yorkshire
Posts: 8190

England 2014 Range Rover Autobiography SDV8 Loire Blue

Too much air and it runs lean.... Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Post #342834 16th Aug 2015 8:42pm
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chex



Member Since: 17 Sep 2012
Location: E. Africa
Posts: 130

Kenya 

Ok I thought the message meant that the lambda was trying to reduce the amount of fuel and exceeded the lower limit of adjustment but you're saying it's the opposite?

Post #342875 17th Aug 2015 5:47am
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Haylands



Member Since: 04 Mar 2014
Location: East Yorkshire
Posts: 8190

England 2014 Range Rover Autobiography SDV8 Loire Blue

Well that's my understanding of it..... Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Post #342901 17th Aug 2015 9:08am
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chex



Member Since: 17 Sep 2012
Location: E. Africa
Posts: 130

Kenya 

Thanks for the help Pete. I have looked for leaks but found none.

My theory was that the MAF is overestimating air mass and lambda trim hits the lower limit of adaptation whilst trying to lean it out so the engine runs too rich and bogs down at low speed.

The attached file (in case you're interested) lists the MAF for upper limit faults but not lower limit faults, it does list blocked catalyst as a cause though and I have suspected I have blocked cats for a while, just haven't got round to installing decat pipes.

Problem is the fault only occurs on long drives so I'll have no idea if it's cured until the next time I'm in the middle of nowhere.

Link to file http://www.bmwfan.lt/forumas/download/file...c6d2ad92fd

Post #346397 6th Sep 2015 4:56pm
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Rewmer



Member Since: 14 Jan 2013
Location: Essex
Posts: 142

England 

Best thing is to check the live values from the MAF

Below are know good values, all loads off, engine up to temperature if yours are any different then further investigation may be needed.

Idle 600rpm 17.1kg/h
1500 36.9
2000 50.2
3000 72.0 No7 - 2003 V8 Vogue

Post #346405 6th Sep 2015 5:50pm
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Shandonman



Member Since: 02 Dec 2013
Location: Argyll
Posts: 90

United Kingdom 2002 Range Rover Vogue 4.4 V8 Adriatic Blue

If it's any help, I had that message for over a year. And 15,000 miles. If I cleared it, it would return the next day or two. The specialist said it was the K&N filter, then leaky injectors My local garage tried firstly the PCV pipes, then the fuel vent valve thingy then a lambda probe. Next was the MAF sensor which was changed - problem solved Very Happy 2002 Vogue 4.4 V8
1995 Disco 1 300tdi

Post #346424 6th Sep 2015 7:52pm
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chex



Member Since: 17 Sep 2012
Location: E. Africa
Posts: 130

Kenya 

Thanks for the replies.

Changed MAF yesterday so lets see what happens. The new MAF is generic so may as well check if it's working.

Post #346459 7th Sep 2015 8:28am
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chex



Member Since: 17 Sep 2012
Location: E. Africa
Posts: 130

Kenya 

Rewmer wrote:
Best thing is to check the live values from the MAF

Below are know good values, all loads off, engine up to temperature if yours are any different then further investigation may be needed.

Idle 600rpm 17.1kg/h
1500 36.9
2000 50.2
3000 72.0


switched back to original maf because the pattern part had a smaller diameter and wouldn't seal on the intake hose.

No probs for a few months but drove 12 hours yesterday and had the same prob on bank 2; live values:

Idle 600rpm fluctuating between 21-25
1500 45
2000 70


Will put the pattern part in and update. Thanks for the help. 2004 L322 V8

Post #364065 27th Dec 2015 9:26am
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