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dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

TD5 MAF failing

No top end a lack power on hills and intermitant not accelerator respond but not every time

Had fuel pump and low presser problems in its history, pump OK 4 bar fuel presser

New MAF two year ago, maybe power supply problem plug in and go for test drive no loss of MAF output BUT still lack power and not accelerator respond

stop removed MAF looks OK but smell bunt

refit MAF check out put at 750 rpm 55 KG -hr 1.90 v

lets work it and see if it holdup 10 min driving re-check out put at 750 rpm 40 - 30 KG-hr max out put driving 230 kg-hr and top of the unit hot

cut long story short fit replacement MAF full power and accelerator respond

3rd Jan 2020 10:20pm

doublecabjon

Member Since: 28 Sep 2014
Location: Dorset
Posts: 31

That will be that then! Top fault finding

3rd Jan 2020 10:28pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4785

Was that a genuine or aftermarket MAF sensor?

I've always stuck with genuine because they are supposed to be more reliable than aftermarket

2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
Tdi 110 Thread https://www.defender2.net/forum/topic69562.html
RRC Thread http://www.defender2.net/forum/topic54492.html
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3rd Jan 2020 10:28pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

genuine

3rd Jan 2020 10:29pm

doublecabjon

Member Since: 28 Sep 2014
Location: Dorset
Posts: 31

Are you using a K&N type filter? If so perhaps a little less dust trapping oil?

3rd Jan 2020 10:56pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

3rd Jan 2020 11:00pm

roel

Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

Also geniune can fail.

Sometimes the fail completely i.e. no reaction on on different air flows but sometimes like yours just give lower values then they should. Like yours. The problem with that is that is happens over a longer time so you don't directely notice it till it gets real bad. Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)

4th Jan 2020 6:16pm

Tommo

Member Since: 19 Dec 2013
Location: Leicestershire
Posts: 830

2006 Defender 90 Td5 Black LE Java Black

You get 2 yrs warranty with genuine LR parts!!

5th Jan 2020 5:50pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

yes but one mouth out side

5th Jan 2020 6:40pm

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