There may be some folk out there who have remembered the saga of my TD6 engine which has all sorts of issues following a dose (or doses) of diesel fuel that was blended with animal/vegetable oil plus it had 22 times the allowable limit of moisture.
Injectors were rebuilt (some replaced) but this took some time and was done over time as local dealer's fault finding was a bit less than I might have hoped for.
The last time I got the car back from them it had a knock in the engine which they said had nothing to do with them. An independant repair shop found they had left the boost sensor disconnected at the rear of the inlet manifold. Knock reduced now but still evident and this could be from bad fuel damaging a piston or as a result of the boost sensor having been left off for a few days.
All comments will be welcomed.
On top of that the auto has failed and the car has been with what I deem to be the best automatic transmission repair shop in my home state.
After fitting two rebuilt transmissions that were each dyno tested before installation the car has a shudder at around 90 kph which is around torque convertor lock-up speed. The torque convertor has also been re-built twice and they cannot find anything that would cause the shudder and now beleive that it is engine related.
The shudder is only evident at what I would call a critical speed and/or engine speed and then it disappears.
The complete driveline has been checked and all is OK.
Car has 114,000 kilometres on the clock and was purchased new.

Has anyone ever experienced such a fault?

Has all the softwares been updated to latest for engine and gearbox ? onto no6 Range Rover

Everyone needs a hobby

speedymarktd6 wrote:

Has all the softwares been updated to latest for engine and gearbox ?

All of the engine & gearbox settings go through ecu's which have software in them... Check this is performing and up to date is your first job...


Craig

When my TD6 suffered juddering issues it was tracked down to a faulty low pressure fuel pump, the one that is external to the tank mounted on the chassis.

Worth a check maybe? Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

I thank you for your response.
The car has just had that pump replaced for second time in 115,000 kilometres and I also replaced the in-tank pump which I reckon had the rather spindly plastic damaged during car assembly.
I also have a FAULTMATE MSV2 and have checked all pressures in fuel system.
Having done so much on the car and had it to what I believe is best auto shop in Australia where they even fitted a tranny from a vehicle that was performing correctly (just as a test) and still have a shudder around torque convertor lock up speed and what might be termed a "judder" when slowing to a stop I am looking more and more at control computer systems and am pleading for any help that is available.

I am always readfy to call anyone who has one of these cars for sharing of information and where possible to assist so if I can ever help you please send a PM with contact details.

speedymarktd6 wrote:

Has all the softwares been updated to latest for engine and gearbox ?