odysseus
Active Member
- Posts
- 231
- Location
- Cambridgeshire
*cough* But the diesels are so reliable... *cough* 
Sorry, couldn't resist.
Sorry, couldn't resist.
lack of power :(
- Thread starter bussy
- Start date
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Datatek
Well-Known Member
- Posts
- 44,887
- Location
- Near Poitiers SW France
Have you checked the insides of the turbo pipes?
yes took them all out and checked but going to try more off of a proven engine just in case i missed something
- Posts
- 58,170
- Location
- Preston Lancs.
It maybe a good idea to stick it on diagnostics and see if anything comes up. You can guess about things for ever more.
turns out I know a man who can walking over to barretts landrover next door to my work (I work at vw) was going to see if they could do me a favour plug in I bumped into my old boss who now works at another garage with full landrover dealer diag equipment so they are going to plug it in for me on Monday will let you know how I get on
- Posts
- 19,297
- Location
- Buckinghamshire, UK. ('95 DT)
Result!
Datatek
Well-Known Member
- Posts
- 44,887
- Location
- Near Poitiers SW France
Things like a duff in tank pump will affect performance but not show a fault.I don't know if this is good or bad got it plugged in diag machine communicated this time
I am beginning to think along those lines as also doesn't start 1st time have to cycle the glow plugs twice which im guessing runs the pump but then starts straight away
hey guys thought I would let you know had the rangie in the workshop today and my turbo actuator is dead it will not move the arm at all when using a mity vac unfortunately its not seized so guessing the diaphragm is duff in it so awaiting another one but atleast I know my issue now and thought I would share thanks again
- Posts
- 16,479
Great to hear you have found the issue...and thanks for getting back to us, there is nothing worse than a thread left hanging!
Best of luck with it!
Best of luck with it!
- Posts
- 58,170
- Location
- Preston Lancs.
No issue found the waste gate works on pressure NOT vacuum.
the waste gate actuator was tested through existing vac pipe with a mity vac creating pressure not vac it did not move, the actuator was tested the same straight to it still no movement completely removed the actuator from vehicle actual gate on turbo moves fine re checked actuator with pressure out of vehicle no movement whatsoever
- Posts
- 58,170
- Location
- Preston Lancs.
OK the actuator maybe seized holding the gate open. But this the first time i have ever heard of one doing that. When the actuator operates it reduces boost pressure. The actuator is adjusted to hold the waste gate normally shut against spring pressure. If it is adjusted correctly that spring pressure should be still applied holding the gate shut. That will NOT give a loss of power. Quite the reverse. There is no vac pipe it is a pressure pipe.
it is held in the shut position, as stated the fault with the actuator is the diaphragm not moving the spring, the spring is fine thus causing the turbo to overboost and the map sensor reads this altering the fueling causing the lack of power as the fault only occurs at around 3000rpm when the turbo is boosting or is that completely wrong?
- Posts
- 58,170
- Location
- Preston Lancs.
Completely wrong. The turbo will not overboost at 3000 RPM. The waste gate will never normally open at that RPM. In the scenario you describe the MAP sensor reading would cause an increase in fuel. More air more fuel more power. You really do need to check the turbo boost pressure.
- Posts
- 58,170
- Location
- Preston Lancs.
Think he has already been there, or at least he was advised to. Whether he did or not who knows.
yes checked that thanks was one of first things.
