http://myweb.tiscali.co.uk/andymacs/media/FAULT DIAGNOSIS.pdf
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turbo:
.. since the TD4 has a variable geometry turbo, there is more to go wrong. Often the symptom shows up engine warning light illumination and a loss of power at a steady speed (50mph+), whereas no problems occur in town. This is due to the variable geometry mechanism not working properly.
Check the thin tubes from the brake servo line to the solenoid and thence to the actuator capsule. Also check the actuator and make sure the mechanism on the turbo has not seized up. (with the engine idling, connect the solenoid directly to the battery - the actuator and mechanism should move.)
see also :
http://www.landyzone.co.uk/lz/f9/td4-lack-power-70mph-fixed-77147.html
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fuel rail pressure sensor:
This can produce a wide range of performance related symptoms if faulty. If dead, or if it has become disconnected, the engine may start but there will be little power - max speed will be 70ish and you’ll be down to 30mph or less on hills. See previous section for the known TD4 water ingress problem.
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be a good idea to clean the electrical contacts ( injector wiring harness ) .. and smear some ' contralube ' on them ..
same applies to all the other engine sensor connectors ..
the fuel rail pressure sensor seems particularly prone to corrosion on the contacts ..
and like some of the others .. only uses a 5 volt supply ..
'contralube' is a dielectrical grease .. and will prevent the corrosion occuring
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ROVER 75 MGZT ENGINE FAULT FINDING
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(edited to add ) IF the turbo vanes are stuck .. it can result in 'overboost' .. in which case the ecu limits the fuel supply
to prevent potential catastrophic failure ..
and btw: going by the engine sound in the videos .. it's like the fuel supply has been limited ..
as if it's not even 'trying' ..
maybe check the condition of the turbo-vent filter .. if it's clogged up .. it could cause the vanes to
stick .. .. try taking the filter off 'n see if that helps ( but remember to replace it !! ) ..
some garages are known ignore / forget about that small filter on a 'service'
'n to prevent fuel tank sediment getting sucked into the filter ..
keep the fuel tank more than half full if possible
( the fuel guage on freelander 1's is known to misread ..
( mine is half full when the guage shows three-quaters full
