2009 RRS NO POWER

[OldBugger]

Hoping someone may have some knowledge or previous experience with a '09 Range Rover TDV6 with very, very little power at low rev's.
The RR has been great however had sat with minimal use for a few months. It has approx 140k Km and was used to tow a large caravan a few times a year. The issue is it now has very low power at lowish rev's. Unable to drive up a short, steep drive way even with a small run up. Once the revs are up and the turbo is working it is pretty good (haven't been game to try it with a load like a caravan as yet).

With my limited knowledge and experience I would have expected it to be a sensor issue. As you can see a lot of diagnosis has been done and still no resolution.

Has anyone had or heard of a similar issue and what was the problem? Now discussing secondhand engines or getting very deep into engine dismantling.

The following has been done at considerable expense by an specialist service center.


PLUG IN DIAGNOSTIC COMPUTER AND CHECK FOR FAULT CODES- NO FAULTS LOGGED
TEST DRIVE TO CHECK ENGINE PERFORMANCE AND RECHECK FOR FAULT CODES- NO FAULT CODES LOGGED
ON TEST DRIVE FOUND VEHICLE PERFORMANCE VERY LOW
CHECK TURBO OPERATION AND OPERATION - SEEMS OK
REMOVE TURBO INTAKE PIPE AND VISUALLY CHECK TURBO INTAKE CONDITION -OK
CHECK AIR FILTER-OK
CHECK ALL AIR INTAKE PIPES FOR BLOCKAGES -OK (NO BLOCKAGES FOUND)
CHECK LOW PRESSURE FUEL -OK
CHECK HIGH PRESSURE FUEL READINGS -OK
TAKE FUEL SAMPLE- OK
CHECK ALL ENGINE SENSOR READINGS- ALL NORMAL
CHECK ENGINE CYLINDER BALANCE- USING DIAGNOSTIC COMPUTER -OK
SWAP AIR FLOW SENSOR AND TRY - FAULT STILL ACTIVE
SWAP AIR FLOW SENSOR BACK TO ORIGINAL
REMOVE THROTTLE HOUSING AND INSPECT -OK
SWAP THROTTLE HOUSING INTAKE AND TEST - NO DIFFERENCE
SWAP THROTTLE HOUSING BACK TO ORIGINAL USING NEW O-RINGS
REMOVE EXHAUST DOWN PIPE AND CHECK FOR BLOCKAGES AND TEST - NO DIFFERENCE
REFIT EXHAUST
CHECK INTER COOLER FOR BLOCKAGES -OK
CARRY OUT EGR BLANK AND RE-CALIBRATE EGR VALUES AND TEST - NO DIFFERENCE
CARRY OUT INJECTOR LEAK OFF TEST
SUPPLY AND FIT 1 X FULL SET OF USED INJECTORS- NO DIFFERENCE
CARRY OUT PCM SOFTWARE UPDATE- NO DIFFERENCE
SUPPLY AND FIT USED TURBO AND TEST OPERATION AND TEST DRIVE - NO DIFFERENCE
SUPPLY AND FIT NEW RH TURBO INTAKE PIPE- OLD HOSE PERISHED
SUPPLY AND FIT NEW ENGINE ECU AND PROGRAM- NO DIFFERENCE
REMOVE STARTER MOTOR AND ENGINE FRONT COVER
CHECK ENGINE TIMING ALIGNMENT- OK ON THE CRANK AND EXHAUST CAMS (UNABLE TO SEE INTAKE CAMS WITHOUT REMOVE ROCKER COVERS)
REFIT STARTER MOTOR AND REFIT ENGINE FRONT TIMING COVER
REMOVE INJECTORS AND CHECK ENGINE COMPRESSION -OK ALL APPROX 300 P.S.I.
REFIT INJECTORS
RECHECK ALL ENGINE SENSOR READINGS AGAINST ANOTHER GOOD RUNNING VEHICLE AND AUTO LOGIC READINGS- ALL NORMAL (OK)
RUN VEHICLE TO OPERATING TEMPERATURE AND RECHECK ENGINE ROUGHNESS/ NOISES
REMOVE AIR BOX LID AND LISTEN TO ENGINE INTAKE NOISE- FOUND TO BE NOISIER THAN IT SHOULD BE COMPARED INTAKE NOISE TO ANOTHER GOOD RUNNING ENGINE TO CONFIRM

[Bulletman]

So does the car pull the van up a hill /driveway in forward using command shift.
I have been reading about an issue with my D3 on the UK site and from what you describe I would say its gearbox related.
Have you had the oil changed at all or is it still on original?
Do you notice any fluctuations on the tacho?

Seems by your list you've covered most of the engine but unless I missed it I didn't see any gearbox item mentioned.

Bulletman

[haydent]

id assume youd be able to tell if gearbox related or not as if its reving and not going anywhere , gb slipping, but if in an appropriate gear and pedal down but struggling to get revs up that is engine power related.

[haydent]

maybe try a different engine ecu ? as if youve got compression and no blockages or errors ud think it must be electrical related either that or fuel supply/injection but ud think the computer would know about that, unless it thinks its all ok and that correct abount being injector but its not that amount....

[scarry]

Sounds to me it needs a trip to a good Indie,such as MR Auto,at Redcliffe.

[ontheway]

Hoping someone may have some knowledge or previous experience with a '09 Range Rover TDV6 with very, very little power at low rev's.
The RR has been great however had sat with minimal use for a few months. It has approx 140k Km and was used to tow a large caravan a few times a year. The issue is it now has very low power at lowish rev's. Unable to drive up a short, steep drive way even with a small run up. Once the revs are up and the turbo is working it is pretty good (haven't been game to try it with a load like a caravan as yet).






Brake light switch. It doesn't necessarily line up with all your findings but it cuts power when triggered and/or faulty and a known issue.

You can experiment by "feathering" the brake pedal when low on power. Replacement is straight forward even for the non technical, if you want to DIY. I got one at Repco when I was in a pinch for $30 or so.