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taazzukcb



Member Since: 30 Aug 2013
Location: Derbyshire
Posts: 663
United Kingdom 2004 Defender 110 Td5 DCPU Stornoway Grey
TD5 Airbox IAP Relocation
Hi All,

The IAP in the TD5 air box (which I believe is to pick-up the altitude changes based on pressure). Is this ok to relocate within the inlet tract or is this based on the pressure within the set air box size/measurement?

So if the air box should change in shape and/or size, the reading would be wrong? Or if it's further down the tract or even high er up pre-filter, would this give incorrect readings?

Just trying to work out some options at the moment and a few theory's/ideas I want to try!

Cheers all!
Post #370337 8th Nov 2014 1:31pm
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taazzukcb



Member Since: 30 Aug 2013
Location: Derbyshire
Posts: 663
United Kingdom 2004 Defender 110 Td5 DCPU Stornoway Grey
Anyone?
Post #370681 9th Nov 2014 10:00pm
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Lou Sparts



Member Since: 15 Apr 2012
Location: Kent
Posts: 1501
United Kingdom 2005 Defender 90 Td5 XS CSW Zambezi Silver
I thought it was an ambient air temperature sensor! Anyone know for sure ? 2005 Td5 90 XS

Steve
Post #370689 9th Nov 2014 10:51pm
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018
United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
Not sure on an IAP but there was:

IAT - Inlet Air Temperature
or
MAP - Manifold Absolute Pressure
Post #370751 10th Nov 2014 11:08am
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taazzukcb



Member Since: 30 Aug 2013
Location: Derbyshire
Posts: 663
United Kingdom 2004 Defender 110 Td5 DCPU Stornoway Grey
The one in the inlet manifold is (as far as I can tell) a mixed Temp and Pressure sensor. The one in the airbox is a Barometric Pressure sensor used to detect altitude differences, where the inlet one is used to monitor manifold pressure (boost etc and temp of course).
Post #370758 10th Nov 2014 11:45am
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taazzukcb



Member Since: 30 Aug 2013
Location: Derbyshire
Posts: 663
United Kingdom 2004 Defender 110 Td5 DCPU Stornoway Grey
See Below:


Click image to enlarge


Click image to enlarge
Post #370760 10th Nov 2014 11:49am
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Will.I.AM



Member Since: 16 May 2013
Location: Hertfordshire
Posts: 413
United Kingdom 2005 Defender 130 Td5 HCPU Kaikoura Stone
i have an induction kit so this sensor is just sitting coiled up in fresh air now, it has never affected performance or running... Thumbs Up
Post #370794 10th Nov 2014 2:12pm
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taazzukcb



Member Since: 30 Aug 2013
Location: Derbyshire
Posts: 663
United Kingdom 2004 Defender 110 Td5 DCPU Stornoway Grey
Yeah, I've just been speaking with Pete as BAS and he's been extraordinarily helpful and he's basically said the same.

Though we've gone through a few ways of keeping out of harms way from water/muck, so I think I know what my route will be.

Will.I.AM, is your's generally an on-road truck? Would you mind taking me a few piccies of your set-up?
Post #370795 10th Nov 2014 2:18pm
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Will.I.AM



Member Since: 16 May 2013
Location: Hertfordshire
Posts: 413
United Kingdom 2005 Defender 130 Td5 HCPU Kaikoura Stone
no probs, what you thinking of coming down or should i send you a pic
Post #370796 10th Nov 2014 2:22pm
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fatman



Member Since: 14 Jan 2014
Location: Athens-Greece
Posts: 126
Greece 2007 Defender 110 Puma 2.4 USW Keswick Green
I believe that if it's correctly connected,it 'll work ok,no matter the location of the sensor.
PS and OT
Problems arose when mixing EU2 with EU3 sensors (and fuel maps) but i think they also had different wiring..
Post #370798 10th Nov 2014 3:16pm
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taazzukcb



Member Since: 30 Aug 2013
Location: Derbyshire
Posts: 663
United Kingdom 2004 Defender 110 Td5 DCPU Stornoway Grey
The problems where when people put NNN ECU's onto pre-NNN vehicles as they used the 3 wire, not the 4 wire like the NNN system did.

Simply fixed by getting the 4-Wire sensor and running the extra wire down to the ECU (Though obviously need the airbox lid to as the mounting shape changed).

The NNN didn't like it when you tried to plumb it into a 3-Wire set-up IIRC.

The 4-Wire is the same as used on a good few MG/Rovers, but with the additional prefix of 'L' at the end of the part number, so not sure how it differs to the MG/Rover item if at all!?
Post #370800 10th Nov 2014 3:22pm
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Fatboy Slim



Member Since: 04 Feb 2008
Location: Bridgend
Posts: 1006
Wales 
Probably doesn't differ much, would be interesting to try one, don't underestimate the importance of the sensor mind you Thumbs Up
Post #370861 10th Nov 2014 7:08pm
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