↓ Advertise on Defender2 ↓

Home > Puma (Tdci) > Inlet air temp ultraguage
Post Reply  Down to end
Page 1 of 1
Print this entire topic · 
Trundlebus



Member Since: 15 Jul 2014
Location: Herts
Posts: 94

United Kingdom 
Inlet air temp ultraguage
Can anyone help with this? I recently fitted an ultragauge and it displays inlet air temp. Been fine and accurate. Today it stopped registering a temperature. Ihwve checked and there are no fault codes shown so is it likely to be the sensor if it is should this be flagged with an error by the ecu and,more importantly, do i have a problem? Currently in the middle of spain so hope i don't need to do anything
Ps car is running fine
Post #608158 9th Mar 2017 3:17pm
View user's profile Send private message View poster's gallery Reply with quote
Trundlebus



Member Since: 15 Jul 2014
Location: Herts
Posts: 94

United Kingdom 
Well it's all a mystery to me, i connected my atric unit ( I have an alive remap) and it showed two error codes B1206 and P0504, tried to find out what these are and one seems to do with brake lights and 1206 is eic circuit open(?) though i have struggeld to find a definitive list and used the gunson std one. Anyway i cleared both of these and now the ultragauge is showing the inlet air temp again. I wish I had a clue how that all works!
Post #608863 12th Mar 2017 1:37pm
View user's profile Send private message View poster's gallery Reply with quote
tomdaprince



Member Since: 23 Feb 2015
Location: IJmuiden
Posts: 54

Netherlands 2007 Defender 90 Puma 2.4 HT Tonga Green
Inlet temp showed by the ultragauge (I got one as well) is the MAF sensor reading, if it stopped showing the temp it is most likely your MAF needs to be replaced.
Post #610015 17th Mar 2017 9:28am
View user's profile Send private message View poster's gallery Reply with quote
Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6260

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
can anyone confirm - would it be MAF or MAP(T) that provides the air temp?

does the MAF just do flow rate and the MAP does pressure and temp?

did you replace anything / has it been ok since?

mine was showing -3C the other day when clearly it wasn't.
Post #642943 10th Aug 2017 11:40am
View user's profile Send private message View poster's gallery Reply with quote
tomdaprince



Member Since: 23 Feb 2015
Location: IJmuiden
Posts: 54

Netherlands 2007 Defender 90 Puma 2.4 HT Tonga Green
That would be the MAF sensor then, is it still showing -3? Would definitely replace it.
Post #642947 10th Aug 2017 11:57am
View user's profile Send private message View poster's gallery Reply with quote
Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6260

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
no it's back to normal Confused

it was like it for an hour or so. restarted engine and back to normal.

I thought I'd seen somewhere that the MAP sensor was actually a MAP(T) sensor - ie T being for temperature?

I guess if I disconnect either and look at the guage I'll know for sure. Thumbs Up

I'm hoping it's a sensor on it's way out or just a freak occurrence and not a damaged loom?
Post #642959 10th Aug 2017 1:54pm
View user's profile Send private message View poster's gallery Reply with quote
Sadi



Member Since: 23 Jul 2015
Location: Windhoek
Posts: 334

Namibia 2016 Defender 110 Puma 2.2 Heritage Edition SW Grasmere Green
Measures temperature and fresh gas flow..
Post #643136 11th Aug 2017 8:50am
View user's profile Send private message View poster's gallery Reply with quote
Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6260

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
thank you Sadi,

assuming I've read that right the MAF is just that - mass air flow and NOT temperature. Thumbs Up
Post #643139 11th Aug 2017 9:30am
View user's profile Send private message View poster's gallery Reply with quote
Sadi



Member Since: 23 Jul 2015
Location: Windhoek
Posts: 334

Namibia 2016 Defender 110 Puma 2.2 Heritage Edition SW Grasmere Green
The MAF sensor should read ambient air temperature too - :

http://www.boosttown.com/electrical_system/maf_sensor.php

It may have some algorithm built in - once the air goes through the air filter it may well not be the same as true ambient any
longer.

The UG should give you 2 readings - one for ambient (MAF) (no other sensors from there to intercooler) - and one post intercooler.

After driving some distance and stopping - you will notice ambient/MAF reading rising due to heat soak. This reading drops when you restart driving.

If you have a buddy with similar vehicle - you can maybe swop MAF sensors and note the result.

Specific MAF cleaners: CRC & Liqui Moly.

As noted in the 1'st - there may be problems in other sensors - not necessarily the MAF.

Hope you get to solve the problem.

https://www.familyhandyman.com/automotive/.../view-all/
Post #643165 11th Aug 2017 11:18am
View user's profile Send private message View poster's gallery Reply with quote
Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6260

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
so it would appear the ultraguage is regularly showing inlet temps of approx. 10-20C below actual.

not sure what / how much impact this will be having on the engine?
Post #646120 24th Aug 2017 6:08pm
View user's profile Send private message View poster's gallery Reply with quote
Sadi



Member Since: 23 Jul 2015
Location: Windhoek
Posts: 334

Namibia 2016 Defender 110 Puma 2.2 Heritage Edition SW Grasmere Green
Hi Caterham,

I have the UG Bluetooth and the BAS Bluetooth dongles - and use the BAS one more often - so the above observations were with the BAS readouts on smartphone. But know from previous experience that the readings of the 2 corresponded very well. But will now measure again on the UG BT and report back. My experience with them was that intake temp.1 was always higher than ambient - should it in fact be recorded by the MAF sensor - there could probably be explanatory reasons for that. I removed the "duckbilled" air intake that connects airbox and side fender to create more space in the engine bay - and also planning to install a Provent catch can there - as on the opposite sitde a second diesel filter will be installed. After removing the above I found the intake temperature 1 to be much closer to ambient. Currently searching some articles re air temperature just before it enters the intercooler - but haven't found the correct one yet. But stumbled on some interesting stuff where racing Diesel engines run EGT's of 1200 deg C - and they may start worrying at EGT's of 1400 deg C. What I'm looking for - is air temperature between where PCV hose joins the post airbox hose and the turbo, and between turbo and intercooler (just before entering IC) - to get an idea of the cooling capacity of the air-to-air IC.
Post #646158 24th Aug 2017 8:20pm
View user's profile Send private message View poster's gallery Reply with quote
Cupboard



Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

United Kingdom 2011 Defender 110 Puma 2.4 HT Corris Grey
The intake temperature is definitely supplied by the MAF, when you unplug the MAF it reads about -40C.

My IAT is pretty much bang on the outside temperature apart from when I've been driving for a number of hours at high (in the 30s) exterior temperatures. After a few hours in those conditions it will be reading about 10C too high.
Post #646285 25th Aug 2017 3:31pm
View user's profile Send private message View poster's gallery Post Reply
Post Reply  Back to top
Page 1 of 1
All times are GMT

Jump to  
Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2024 Futuranet Ltd & Martin Lewis
DEFENDER2.NET RSS Feed - All Forums