TD5 EGT

**sierrafery** · 19th September 2015, 03:18 PM

If you have nanocom watch the IAT and MAF readings when that high EGT occurs... also if the crankcase breather(depression controll) valve is old replace it just to rule it out cos an old one can mix up MAF readings also it will be excess of hot air in te intake which leads to higher IAT and so on

if you bypased the wastegate modulator shorten the rod with 3-4 threads to increase boost a bit also unplug it's electric connector to make the management go into default with that otherwise the whole fueling is mixed up due to the fact that the addaptive strategy for acceleration expects a certain boost according to the wastegate controll ratio and it gets something different... it depends very much on the fuel map version though so only a drive test with the modulator unplugged is really relevant, it can be better or worst only the reality is important

**Mellow Yellow** · 19th September 2015, 03:40 PM

Have you seen this thread? :-

http://www.aulro.com/afvb/technical-...t-temps-2.html

Careful configuration/instalation of the probe is required to get accurate temperature readings.

**singlecell** · 20th September 2015, 01:00 PM

Originally Posted by Jazzman

With the factory map and factory tires I went for a test drive:

3500 RPM accelerating from 50 to 90 km/h

EGT = 710 degrees
Boost = 15 PSI

Not an unlikely scenario Land Rover would not have thought of.

I just don't know. EGT gauge could be wrong, 720 degrees max could be incorrect, boost could be too low.

I"m just going to have to test / calibrate my sensor and gauge before i can go any further.

Ran the car through that today and got about 730 on my gauge as I was getting to 90.
Usually I don't accelerate that hard though and get much lower temps while driving.

**Jazzman** · 21st September 2015, 12:11 PM

Originally Posted by Mellow Yellow

Have you seen this thread? :-

Low EGT temps?

Careful configuration/instalation of the probe is required to get accurate temperature readings.

I've read this thread now thank you. But it talks about 300TDi, i'm not sure the TD5 would be the same. Some people say they have bent the probe, it does say on the packet not to modify the probe or wire length in any way.

My probe is mounted directly on top of the exhaust manifold were it turns into one pipe. There was a round dimple on the top and I drilled though right there.

The end of the probe sits about 1.5 mm above the internal wall of the bottom of the exhaust manifold.

The gauge reacts quickly to changes higher or lower in temp.

Tombie · 21st September 2015, 05:41 PM

First - fix your boost.

**Disco Muppet** · 21st September 2015, 06:45 PM

Originally Posted by Tombie

First - fix your boost.

X 2

Seriously, you know that running low boost will drive your EGTs up, don't go looking for problems that might not exist

Sent from my HTC One using AULRO mobile app

**Jazzman** · 21st September 2015, 07:36 PM

Originally Posted by Disco Muppet

X 2

Seriously, you know that running low boost will drive your EGTs up, don't go looking for problems that might not exist

Sent from my HTC One using AULRO mobile app

Originally Posted by Tombie

First - fix your boost.

I 100% agree. Do you happen to know what boost TD5's run standard? I'll get it working on the factory map first with factory boost first. I thought it was about 20psi?

**DiscoDB** · 21st September 2015, 08:05 PM

19psi, but if you get it to 20psi you should still be below the over boost cut off. The problem is depending on your remap you could still end up with chronic overboosting, hence why some re map providers mask with backing off the turbo boost. You will then need a boost box to limit the max signal seen to counteract or a less aggressive remap.

If you get too high on the factory map and get over boost induced limp mode, just back off the adjustment a bit.

**CU55TM Disco** · 22nd September 2015, 06:24 PM

Originally Posted by Disco Muppet

Where is your probe mounted PC?

Sent from my HTC One using AULRO mobile app

In the end of the manifold where the EGR pipe used to go. I realise this isn't as accurate as the OP, but 730! holy Moly!!!

For reference, the standard td5 boost is 15psi, or at least thats what mine seems to run. Reading taken from the inlet manifold on a mechanical gauge.

If the tip of you probe is so close to the wall of the mainfold, maybe that is swaying your readings???

**sierrafery** · 22nd September 2015, 06:55 PM

It seems that your's is low on boost if you get only 15psi, the standard D2 Td5 is set to go up to 230 KPa MAP reading which at average 100KPa ambient presure means 1.3Bar(close to 19psi), 15psi is very close to 1Bar which is the default mode for faulty AAP sensor, the Td5 Defender is a bit lower(MAP=210, around 16psi) cos it doesnt have the wastegate modulator... mine went up to 1.22 Bar reading with nanocom then i shortened the wastegate rod and now i get 1.31 under full load with the original ECU...even with the remapped one the boost is almost the same just that it has better throttle response and more power at low revs

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