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Go Beyond

Member Since: 30 Jan 2012
Location: Headcorn, Kent
Posts: 6678

MAF sensor ?

I have a TD5 130 '52 plate with 80,000 miles on.

It is totally standard and has only ever been serviced by a main dealer.

Recently it has started being very 'flat' from starting with hardly any rise in revs when the accelerator is pressed to the floor until 40 or so seconds have elapsed and then it is fine.

I've replaced the accelerator with another from a trusted source (my other TD5 that is working fine) and this made no difference.

Through reading this forum today I've guessed it my be the MAF sensor at fault ? - I presume I can swap this over from my other TD5 and see if it cures the problem ?

Once sorted I'd like to improve the 'power' without spending too much, I've sourced an EGR blanking kit from a forum member but to be honest don't know if that is the first thing I should be doing or if it should be in conjunction with other bits - advice would be welcome

20th Aug 2012 12:49pm

Steve B

Member Since: 22 May 2009
Location: Warwickshire
Posts: 586

Hi,

I would fit the egr blank, you won't notice any difference if it was working correctly but at least you won't be recycling exhaust gas back into your engine which can't be good. MOT won't be effected.

I think it sounds like a poorly MAF get a genuine one, I got a cheap one which improved mine but I still feel a genuine one would be better.

My biggest improvement was fitting a VGT turbo from IRB, better low down.

When I get around to getting a remap I will fit a genuine MAF.

I fitted a new fuel filter which seemed to improve things?

Steve

20th Aug 2012 1:38pm

Go Beyond

Member Since: 30 Jan 2012
Location: Headcorn, Kent
Posts: 6678

Cheers Steve,

I'm pretty sure it's the MAF from further reading - I'm just trolling around now to get the best price on a Genuine replacement.

It's very recently been fully serviced so no issues with filters etc.

Changing the turbo seems quite a major upgrade, what is the best mod on a 'bang for buck' basis in your opinion ?

20th Aug 2012 2:02pm

ben_j85jty

Member Since: 02 Sep 2008
Location: Bicester, Oxfordshire
Posts: 491

2002 Defender 110 Td5 XS DCPU Bonatti Grey

The easiest way to test the MAF is to disconnect it and see if there is any improvement once the ECU revents to its default map.

Once you have acertained it is the MAF, its only worth replacing with a genuine one - I tried 3 cheap ones before I learnt my lesson.

Once the new one is in, the duty rumor is that having an aftermarket filter (oil based) can serious affect the MAF.

HTH,

Ben 2002 Defender 110 DC

20th Aug 2012 2:15pm

Steve B

Member Since: 22 May 2009
Location: Warwickshire
Posts: 586

Hi

From everything I have researched a basic remap is best, get everything working well then what is called a stage 1 will be best value. I think your like me you just want more low down and a nicer drive. I don't need 200+ bhp but low down smoother drive would be nice.

Steve

20th Aug 2012 2:32pm

Go Beyond

Member Since: 30 Jan 2012
Location: Headcorn, Kent
Posts: 6678

Thanks Ben.

Yes, that's exactly what I'm after Steve, just got to decide on whom to go to .... any site discounts tuning guys ???

20th Aug 2012 2:35pm

Landlord

Member Since: 27 Oct 2009
Location: Hampshire
Posts: 582

Definatly use genuine I made same mistake of using non genuine and didnt last long. Theres no problem in trying the one from your other TD5 takes about 5 minutes to change only need a screwdriver. Easy job especially if youve done it 6 times (fed up with changing them!).

Be carefull with a remap as this can help to reduce the life of the MAF. Obviously depends on the remap some are better than others. However a good remap will improve economy and performance. Alisport can remap to your requirements - worth a call. 2007 TD5 90 Hard Top

20th Aug 2012 2:35pm

Go Beyond

Member Since: 30 Jan 2012
Location: Headcorn, Kent
Posts: 6678

Genuine one ordered from Dan at Duckworths

20th Aug 2012 2:52pm

Nick T

Member Since: 29 May 2011
Location: Bolton
Posts: 203

2010 Defender 90 Puma 2.4 HT Galway Green

I still have a similar problem with my TD5. Went down all the usuall suspects route, still got the problem. It's as if the turbo is waiting to kick in and when it does, boy does it take off.

20th Aug 2012 3:02pm

Waldo

Member Since: 18 Jul 2010
Location: Bit South of Manchester
Posts: 240

Have a very similar problem myself
White smoke on startup when putting the power down.
Lack of power for first maybe 30 seconds
Then the power flies on.

Changing MAF for genuine one within the next two days.
Will report back Defender 90 XS TD5 (03 Reg)

20th Aug 2012 5:35pm

Landlord

Member Since: 27 Oct 2009
Location: Hampshire
Posts: 582

Changed mine yesterday.. but still have similar problem. Don't think it's the MAF this time, can't be 2 in a month. Seems to be fine in the morning and colder days but if the ambient temperature is high (higher than normal !) power seems to be down then comes and goes.

Tonight checked

air filter - clean

Fuel pipes - no obvious kinks or damage

No loose pipes or cables

Turbo waste gate - appears to move smoothly

No obvious leaks

Only other thing I can think of is the injector wiring loom. Have noticed the occasional misfire on tick over and slight hesitation / coughing at low speed pick up.

What are the symptoms of oil in wiring loom and should I have it at just 40000 miles ? 2007 TD5 90 Hard Top

20th Aug 2012 6:50pm

Dave-H

Member Since: 08 Feb 2011
Location: Surrey
Posts: 1507

2007 Defender 90 Puma 2.4 HT Tonga Green

Go Beyond wrote:
Thanks Ben.

Yes, that's exactly what I'm after Steve, just got to decide on whom to go to .... any site discounts tuning guys ???

IRB Developments or Bell Auto Services ... Ian [IRB] and Pete [Bell] are without doubt the masters of the trade.

With you being south like me, IRB are probably the easiest option [Sutton coldfield]

But both are at Eastnor show this weekend

Guns and Landrovers .... anything else is irrelevant.

20th Aug 2012 7:35pm

Steve B

Member Since: 22 May 2009
Location: Warwickshire
Posts: 586

Dave-H wrote:
Go Beyond wrote:
Thanks Ben.

Yes, that's exactly what I'm after Steve, just got to decide on whom to go to .... any site discounts tuning guys ???

IRB Developments or Bell Auto Services ... Ian [IRB] and Pete [Bell] are without doubt the masters of the trade.

With you being south like me, IRB are probably the easiest option [Sutton coldfield]

But both are at Eastnor show this weekend

+1 hopefully get mine done by IRB, they seem to be very busy.

Steve

20th Aug 2012 7:54pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5682

2006 Defender 110 Td5 USW Zermatt Silver

Lack of power from startup and more so when cold is classic signs of MAF failure.

If you talk to Gary at Alive he may be willing to send out a MAF foc, let you fit and if it sorts it, pay him, but if not required you send it back to him. That's what he did for me

And he's cheaper than the dealer for a puka MAF.

They are quite delicate and can be knackered out the box, and oil covered air filters kill them, as does water

Andy

20th Aug 2012 8:12pm

Waldo

Member Since: 18 Jul 2010
Location: Bit South of Manchester
Posts: 240

New MAF installed.
Engine was hot so started up normally.
Much better power throughout the range of revs.
Will report back on whether smoke has dissapeared on cold start up.

Will Defender 90 XS TD5 (03 Reg)

21st Aug 2012 12:29pm

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