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Fender

Member Since: 05 Sep 2009
Location: Cotswolds
Posts: 3

2008 Defender 90 Puma 2.4 SVX Soft Top Santorini Black

Turbo intermittently working - need help!

Hi All,

My TD5 XS (2004) has started to develop a fault where the turbo doesn't kick in when it should. I can be driving one day and all is fine and the next day for the fist 500 or 800 yards the turbo does not kick in at any rev or speed. Sometimes it can be a mile or two before the turbo kicks in. I have taken it to a local guy (4BY4 SPECIALIST) and he says it does not do it when he has it. This is now getting worse and I need to solve it as I have to pull out on a 60 MPH road at the end of the lane, even checking it is clear to do so I still manage to pull out and end up getting in the way of someone!

There is little rhyme nor reason to when it does decide to work but seems to kick in (at some point) during a trip!

The XS has only done 74K and is solid otherwise. Any help would be appreciated greatly! Also have a 2009 60th edition but it hasn't got the carrying capability that i need at the moment so need to sort it soon!

9th May 2017 7:23pm

roel

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

It could be the turbo or the MAP sensor, or something completely different. 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)

9th May 2017 8:13pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

Are you sure it's the turbo? Or just a lack of pull. Try unplugging the maf and driving about for a day or two. Ray
My build thread
http://www.defender2.net/forum/topic17615.html

9th May 2017 8:20pm

Fender

Member Since: 05 Sep 2009
Location: Cotswolds
Posts: 3

Thanks for the response. My stupid but what is the MAF sensor? How do i reset it?

Cheers!

9th May 2017 8:56pm

JustFX

Member Since: 10 Nov 2016
Location: Mendip Hills
Posts: 190

2000 Defender 110 Td5 CSW Coniston Green

MAF == Mass Air Flow meter. The thing with wires in near the airbox. It's a couple of wires that when heated can calculate the flow of air. The problem is it can get mucky. if you disconnect the plug it will run on default settings which may make it better.

I personally suspect the turbo, leaking air pipe, or intercooler has broken. I had a turbo that was wobbling so much that the blade would stick to the housing so wouldn't spin up. You can get to the turbo easy to check it...just take the pipe off and wiggle the end.

Intercooler maybe faulty and letting air out until it self-seals with pressure.

But start looking for cheap and obvious first. Also, do a search for cleaning the map sensor on the inlet manifold.

9th May 2017 9:14pm

Fender

Member Since: 05 Sep 2009
Location: Cotswolds
Posts: 3

Thanks for the tips! I've got some time this weekend so will give these a go and let you all know!

11th May 2017 6:23am

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