Loss of power

[rich-m]

Hi all, quick question.

I have a GT TDI and this weekend it has developed a total loss of power, to the point where it wont climb any banks and when I put my foot down it is shaking at the start of the turbo cycle.  At fisrt the turbo didnt seem to be kicking-up and although it seems to come on, its only minimal.  I can feel it spinning up but its here when the pedal shakes and it just doesnt seem to like it.

I've had a problem ages ago with the turbo pipe that was replaced by VW, its similar to then but not as bad.

This forum has been a saviour for me with other faults so hopefully I can get some help before I goto a garage and get told a load of nonsence and get ripped off?

Thanks.

[Rmachines]

Well it does sound like your loosing boost pressure somwhere.  It could be to do with the wastegate if its not leaking from the intake.  Can you hear air escaping at all?

[saul79]

turbo/ maf sensor or a split vacuum pipe or boost solenoid

[rich-m]

I've since had the RAC out to it and the guy seemed quite knowledgable.  He did a thorough check but couldnt see any pipe cracks or splits and got his diagnostics kit on it and that brought up temp sensor (?) and it said 'maximum boost exceeded'.  (any thoughts on these chaps?)

It judders quite bad when I put my foot down, its always at the point that the turbo cycle begins that it does it.

Thanks for your replys.

Rich

[saul79]

replace the temp sensor as these always fail.if its a pd 1.9 tdi with variable veins ,these get sooted up and slow it down causing it to loose power .

[rich-m]

replace the temp sensor as these always fail.if its a pd 1.9 tdi with variable veins ,these get sooted up and slow it down causing it to loose power .

#

Cheers mate, I'm off to a VAG specialist tomor so I'll use that info to make it look a bit like I know what I'm on about. 

Any ideas roughly what I can expect to pay fitted (It's a 1.9 GT TDI PD).

Thanks

   

[saul79]

turbo alone is £1000 ,temp sensor you can fit your self ,labour time to fit the turbo around 3 hrs

[rich-m]

I have taken it to a specialist today and been told that the Actuator is blocked-up (?) and that the turbo will need sending away to be stripped down and the 'nozzles' will need cleaning?

The guy got some sort of manual vacuum on the actuator and that has helped the power quite a bit, but its still way below par.

Can anyone please add any info to this nozzel cleaning theory as the price I have been quoted is very expensive and I'd just like someones opinion on here before I pay this money to have it done?

ta

[saul79]

never heard off the nozzels been cleaning- was it a diesel specilist? pd injectors are very expensive

[rich-m]

yes mate, it was a VAG specialst local to me.  I've spoken to a mate who used to work on PD 's and he said he'd never heard of that either. 

It seems a big bill to pay for something that no-one knows about.  Is it likely to just be a dodgy actuator as whatever was done earlier as at least helped things?

One thing for sure, there is no power loss at the pipes or anywhere else.

I'm stuck with what to do?