Power issues

Paul Coddington said:

Hello All.
Once again a pointer in the right direction is needed. So this 2.5 DT manual gearbox pain in the backside is giving me grief. It s current problem is that it's being completely gutless on hills apart from the odd occasion when it suddenly remembers how it used to perform.
I've checked and replaced the tubing for the MAP sensor, the fuel filter and tried another MAF sensor all to no avail.
A visual inspection shows that there's intermittent air bubbles in the clear pipe from the filter, so I'm going to remove and it just to check the seals. My other thought is that it's dragging air in on the fuel pump.
The lack of power on hills and the fact that it's pretty much ok on the level roads makes me think that the pump is on the way out, (I've found the post from wammers in the tech archive and will go through the tests).
My immediate question is if I unplug the MAF and drive it round the same hills it's way better, wouldn't a dodgy fuel pump give the same symptoms, wether or not the MAF was connected.
Ta muchly

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Paul Coddington said:

Update. So eventually got round to checking the turbo, and the actuator is seized, I can't get it to move inwards at all. So having decided that this is probably the issue I would ask, is it best to just change the entire turbo or would it be worth try a replacement actuator first.
Thanks

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Paul Coddington said:

I have had a bar on it, to no avail. I can get it to move slightly away from the unit but it springs back. I've had no success moving it towards the actuator body. Any handy methods of freeing it off. Or is it a case of removing it and trying that way.

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Datatek said:

I did it on what turned out to be a scrap turbo on the bench, brake cleaner or Acetone. I still have the turbo I can do photo's if it would help.

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Paul Coddington said:

Yes definitely interested in photos and a DIY guide. it's got to come off anyway, new turbo's are a ridiculous price, Currently trying to source a recon which is proving difficult. So any chance of resurrecting this one is definitely the way forward.
Thanks

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Datatek said:

Very sorry, it seems that the exhaust side of the turbo with the waste gate has gone missing so no photo's, probably went in the scrap iron bag. The actual waste gate is quite simple when disconnected from the actuator.

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Datatek said:

Very sorry, it seems that the exhaust side of the turbo with the waste gate has gone missing so no photo's, probably went in the scrap iron bag. The actual waste gate is quite simple when disconnected from the actuator.

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Paul Coddington said:

So everyday is a school day, I've removed the turbo and exhaust manifold today, and having looked at it and the actuator I realised that I've got this issue wrong.
I was given to understand that the actuator is operated by a vacuum and pulls the rod to open the waste gate. But that's not the case.
Can any of you clever people tell me when would the actuator begin to work. I was told that movement should be seen as soon as the engine is revved, mine didn't move despite the revs.
I would assume that the turbo generated the pressure from the get go.
I'm trying to get an idea of I should replace this turbo or not.
As a further bit of info the actuator does push but it requires a deal of force, I used of a small pry bar.

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