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Waldo



Member Since: 18 Jul 2010
Location: Bit South of Manchester
Posts: 240
United Kingdom 
Smoke dissapeared on cold startup.
All is well Thumbs Up

Will Defender 90 XS TD5 (03 Reg)
Post #163884 22nd Aug 2012 11:00pm
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tolley



Member Since: 07 Nov 2011
Location: gloucester
Posts: 1114
United Kingdom 2006 Defender 90 Td5 CSW Oslo Blue
how much are the MAF sensors will good to see all is well. Thumbs Up
Post #163964 23rd Aug 2012 2:45pm
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Waldo



Member Since: 18 Jul 2010
Location: Bit South of Manchester
Posts: 240
United Kingdom 
I believe mine was 75 plus VAT

Will Defender 90 XS TD5 (03 Reg)
Post #163969 23rd Aug 2012 2:57pm
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Go Beyond



Member Since: 30 Jan 2012
Location: Headcorn, Kent
Posts: 6678
United Kingdom 
Fitted new 'Genuine' sensor last night ...... instant cure !

Cheers guys Thumbs Up
Post #164110 24th Aug 2012 8:29am
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Andrew DefenderBits



Member Since: 15 May 2012
Location: Somerset
Posts: 43
United Kingdom 2003 Defender 110 Td5 HT Alpine White
The aftermarket MAF usually has a resistor based sensor which although functions at a constant flow, doesn't respond very quickly to changes in airflow and causes hesitation and a slow pickup. We also sell the VDO unit which is a hot film sensor type, the same as the genuine LR unit and gives identical performance and flow readings to the LR unit.
There are MAF cleaning solutions on the market to clean any deposits off from running oiled filters but I haven't tried any myself to know how effective they are.
Post #164692 27th Aug 2012 10:42am
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rustandoil



Member Since: 08 Sep 2012
Location: Cotswolds
Posts: 738
England 2005 Defender 110 Td5 XS DCPU Bonatti Grey
I didnt realise i had a problem until i read this thread Very Happy
I hadn't realised that the performance of my 110 had slowly degraded, but reading this thread showed that my engine was showing some of the symtoms that have been mentioned, flat spot when cold etc.
Bought a new siemens MAF sensor and i am now enjoying a smoother more powerfull engine Thumbs Up
Post #166975 8th Sep 2012 7:11am
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Landlord



Member Since: 27 Oct 2009
Location: Hampshire
Posts: 582
United Kingdom 2007 Defender 90 Td5 HT Cairns Blue
Makes you wonder how many TD5 's are running round with the same issue and the owners are not aware believing the performance or lack of it is quite normal Exclamation 2007 TD5 90 Hard Top
Post #166977 8th Sep 2012 7:16am
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rustandoil



Member Since: 08 Sep 2012
Location: Cotswolds
Posts: 738
England 2005 Defender 110 Td5 XS DCPU Bonatti Grey
Landlord wrote:
Makes you wonder how many TD5 's are running round with the same issue and the owners are not aware believing the performance or lack of it is quite normal Exclamation


I agree! I reckon i know my 110 pretty well but i suppose if the performance slowly degrades you dont notice Confused
Post #166979 8th Sep 2012 7:20am
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Treebeard



Member Since: 27 Jun 2012
Location: Forest of Dean
Posts: 40
United Kingdom 2005 Defender 110 Td5 CSW Chawton White
My MAF sensor is completely dead (i.e. zero airflow measured) - has been for ages. Below 2000 rpm all is excellent, but it seems to hit a ceiling when it gets to about 2200 prm if any torque is required (will spin up in 2nd & 3rd on the flat, if I can wait that long!).

Are these symptoms that are caused by a dead MAF sensor?

The trouble is that I average 33mpg easily, without driving too slowly either. I suppose that I could only connect it up at weekends...
Post #166983 8th Sep 2012 7:40am
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Landlord



Member Since: 27 Oct 2009
Location: Hampshire
Posts: 582
United Kingdom 2007 Defender 90 Td5 HT Cairns Blue
Yep I'd put money on !

Obviously your MAF is dead, the symptoms you mention are all linked to it. I'd change it immediately. Should only help your fuel consumption as the engine wil be working more efficiently again. 2007 TD5 90 Hard Top
Post #166984 8th Sep 2012 7:47am
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Treebeard



Member Since: 27 Jun 2012
Location: Forest of Dean
Posts: 40
United Kingdom 2005 Defender 110 Td5 CSW Chawton White
New VDO MAF fitted - goes like poo off a spade (everything being relative). No longer a ceiling at 2200 rpm. And the nanocom gets sensible airflow readings.

The LR literature states that the MAF output is used for EGR operation - nothing about fuelling. There are many threads on various forums debating what the MAF output is used for. For me, it is now beyond doubt that there is a possibility that the MAF may contribute to fuelling.

Very pleased!
Post #167002 8th Sep 2012 11:30am
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