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mustafasoleiman

Member Since: 21 Jun 2016
Location: London
Posts: 105

2003 Defender 90 Td5 XS CSW Indus Silver

Bad MAF

My 2003 Defender 90 was struggling when accelerating, and after reading many an advice here, I decided to try and unplug the MAF power supply.
The acceleration was immediately improved, the engine smoother.
Now I am keeping an eye on the fuel consumption to see if that improves as well.

In the meantime I'm wondering what are the possible issues of not having a MAF at all, as opposed to replacing it.
Any ideas on the pros and cons?

It'll take me about a week to find out about the fuel, after that I will decide.

Btw there are no other mods to the engine.

Alex

29th Oct 2016 8:17am

nosnibod

Member Since: 15 Aug 2007
Location: West Midlands
Posts: 370

1998 Defender 110 300 Tdi SW Bronze Green

You will find that it's a bit gutless without a MAF at low revs. For example mine would reverse off our steep drive on tickover with a working MAF, but wouldn't with either a faulty MAF or with it unplugged. In fact that was always the first indication that the MAF was starting to fail.

The general advice is do not waste money on a cheap MAF - get a proper OEM version from a reputable supplier. Dave
Green Goddess - 1998 Defender 110 300tdi

29th Oct 2016 8:26am

Tiger

Member Since: 06 Jul 2012
Location: Wales
Posts: 2265

£70 to get a new OE, bit of a no brainer

29th Oct 2016 9:21am

mustafasoleiman

Member Since: 21 Jun 2016
Location: London
Posts: 105

It's not a financial issue TIGER, it's curiosity to know what are the advantages and disadvantages on not having a MAF.
I will get a new good quality one as soon as I am done with my silly curiosity...

NOSNIBOD has given one disadvantage: gutless at low rev... I will look for that, thank you.

29th Oct 2016 10:31am

roel

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

I found that there is a bigger difference between a bad MAF and No MAF then there is between a good MAF and no MAF.

And somewhere in between you have a working MAF that doesn't give the right values. 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)

29th Oct 2016 9:50pm

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