Thread: Weak Td5

Hello down under!
I’m a swedish LR owner having performance issues with my Disco II Td5 -99, 240 000km:s. A bit of a long story but here it goes:
A few years ago the automatic gearbox was repaired by an experienced and well reviewed gearbox workshop. Everything was fine for about a year, then I noticed performance problems. Low speeds no problem, but impossible to maintain speed at even small hills, going down from 100 km/h to 70 making lines behind me and annoying other drivers. I suspected the gearbox again because of similar behavior before the previous box gave up, went to the gearbox workshop and was told there was only 6 months warranty on rebuilds but they took it for a spin and told me it was not the gearbox that was the problem. On a weekend I took a trip with the caravan and It was not a good experience. Had to abort as I had troubles getting up to speed, more than 70 Km/h was almost impossible.
So: I did the stall test and the gearbox instantly gave up, and so did I. Put the car in a garage for two years until I had gathered enough guts to do a gearbox change on my own. Bought a rebuilt one from Ashcroft with heavy duty converter. Spent a big and exhausting part of my time under the car, and while the box was away I also did some other maintainance. The new box wasn’t performing very well, rough gear changes mostly, a gearbox ECU replacement fixed that. Still not performing so I checked the oil level in the box and could fill almost two liters! A broken connection on the oil cooler was the reason, maybe the reason for the first two boxes gave up as well… After oil cooler exchange and oil fill the gearbox worked as it should, but still very bad engine performance. I have done most of the fixes for this problem but nothing gives me the performance expected. Uphills, even normal hills on the highway slows down badly. Pressing the pedal revs up the engine but no result on speed, just more revs. Fuel consumption is normal. No sign of diesel leaking from the injectors(oil level slowly decreasing as expected). Starts flawlessly, even running. No black smoke, no smoke at all really and normal CO2 at yearly checkups.


So far these fixes are done:
New fuel pressure regulator (x2, last time including the filter)
New MAF sensor
EGR blanking
Silicone hoses
Changed the injector harness (Yes, it was leaking oil badly so I also opened the ECU but nothing inside)
New waste gate regulator (x2)
New diesel pump
New air filter
Driving without mufflers make no difference


I have no errors on Nanocom
Links to Nanocom log files if anyone interested:


Engine: https://app.box.com/s/r3q3js3r9z184u95eup17lzuq0fui9dv
Gearbox general: https://app.box.com/s/1dzgjif58t0pq0rw3hgc1cm4629adhad
Gearbox pressures: https://app.box.com/s/dlvzarrs0j4v8h9wxy1l3pomwj3b0h9h


Can anyone explain why all pressures except ”3-4 speed range 1” are at zero?
Are the accelerator voltages ok?
What have I missed? Please give me some advice. I was planning to keep this car for life, so I won’t give up.

*Remove the air intake tube that connects to the turbo and put ur fingers in and see if the turbo fins spin freely, obviously with engine NOT running.
*Disconnect the waste gate actuator rod off the spindle on the exhaust manifold and see if the waste gate opens and shuts freely, if not lube with something like Lanolin spray and open/shut open/shut until it is free.
*As already noted, disconnect turbo modulator and run a line straight from inter-cooler pipe to turbo waste gate actuator.