Altea Tdi Sport Turbo problem

  • Thread starter Windy Altea2123
  • Start date

Windy Altea2123

Guest
Hi all.

I now seem to be suffering with yet another ' common ' problem :( with my 54 plate Altea 2.0Tdi Sport which has only done 52,000 miles and I have owned for 6 years.Having suffered with brake pedal switch failure, throttle acctuator issues, back lights with a mind of there own, a music system which turned itself on during the night and am still saving to get the traction control fixed, the turbo is now deciding to play up......

After leaving the car for a week at Gatwick airport I set off North for the 180 mile journey home. All was fine for the first 40 miles of motorway driving. Then on the approach to an incline I depressed the accelerator a bit further to maintain the 80 mph in 6th; instead of maintaining speed though the car started to slow, throttle pressed further and still slowing, dropped to fifth and just managed to maintain 50mph uphill with accelerator flat to the floor. It then dawned on me that there was no turbo boost apparent. But no warning lights, no strange noises etc etc ?? I then had an 'interesting' further 140 miles of motorway with no turbo. The car still did 53mpg though. ( was unaware that turning off ignition would reset!)

Next morning checked all the obvious and everything appeared ok. Started the car sounds normal and turbo spooling up - no smoke from exhaust. Upon driving the car turbo was back, but not quite as before.:confused:

2 weeks on and no total turbo loss BUT it's not quite right( have yet to do a sustained motorway journey). The turbo now appears to spool up 600rpm further up the rev range; before the above journey it would come in around 1300rpm and be on good boost by 1600 and get stronger from there. Now it is flat until almost 2000rpm when it builds boost and then goes as before.
The turbo is now virtually silent whereas before it was clear when it was coming in / dumping gases ???

Car still doing great MPG ( virtually always in the 50mpg+), oil clean, not smoking, no stuttering or missing when accelerating etc

Having read previous posts I have given it a good thrashing to decoke the turbo and apart from it's lack of bottom end torque all is fine. This has not improved anything.

Am now unsure where to go MAF sensor, turbo had it, leak in a pipe, wastegate stuck ?????

Other than the character building issues I love the car, the economy and performance.

Any idea's would be much appreciated .......
 

cherryone

Active Member
Dec 15, 2006
60
0
Could also be a pipe intercooler leak or sensor failuire. I had issue once where the garage hadn't put the bottom intercooler pipe clip on properly and suffered a loss of power as you have described.

Again after pulling over and a restart it cleared and then remanifested itself - worth a check !
 

Windy Altea2123

Guest
Cherryone and sssstew many thanks for your posts.:)

Once I can get outside and spend some time will check the pipes / clips properly before moving onto MAP sensors etc etc

Any other suggestions ???????
 

Windy Altea2123

Guest
Have managed to borrow my mates VAG com which has thrown up the following fault code :-

16683 Boost pressure Regulation control
Range not reached :p0299
Signal outside tolerance

I was able to clear the fault code and this has stayed off with the engine started / revved ( although not driven car yet). Having read other threads it may just be a matter of time before it is back on?

With this information can anyone offer a better idea of the problem and fix, as the other threads are pretty inconclusive and most are in relation to chipped vehicles / higher boost pressures, mine is standard.:confused:
 

spud31

Rail Zip User
Jul 14, 2011
407
2
is your a bkd engine code?
these have a electronic turbo wastegate actuator vice the normal vac type.
They do have a reputation of dying but it could be the vanes are getting stiff so it dosent have the grunt to move them anymore so will register a code.
Would be worth getting a boost log done with vag.com
 

Viking

Insurance co's are crap.
May 19, 2007
2,317
4
Near Richmond, North Yorks
is your a bkd engine code?
these have a electronic turbo wastegate actuator vice the normal vac type.
They do have a reputation of dying but it could be the vanes are getting stiff so it dosent have the grunt to move them anymore so will register a code.
Would be worth getting a boost log done with vag.com

:confused:

There isn't a wastegate fitted to his car, and the turbo control is vacuum, not electronic. The VNT system is controlled from the main vacuum control box, along with the EGR system.
 

spud31

Rail Zip User
Jul 14, 2011
407
2
Look at pic dude it is vac but has a black housing with and electrical plug on it to measure actuator movement
Maybe some have this and some dont as all the slightly later bkd and 170 version have had this
 

Viking

Insurance co's are crap.
May 19, 2007
2,317
4
Near Richmond, North Yorks
That turbo is a Passat 170 unit by the look of things. You first said it wasn't vac operated, now apparently it is /B] vac operated. I'm not sure.

Carry on.... :rolleyes:
 

spud31

Rail Zip User
Jul 14, 2011
407
2
ok will do :(:(, garret actually call it an electronic actuator on there site even though its vac over electronic.
Anyway the OP needs a boost log done to see if the actual vs required is anywhere near close.
 

Windy Altea2123

Guest
Spud / Viking really appreciate the comments - but your knowledge is way beyond mine !
BKD ? presume this is an engine type ? Where can I find this out presume there is a number some where ?

Have been out his morning since clearing the fault code and still the same.

Disconnected the MAF sensor lead for half mile drive. No warning lights and car drove smoothly but with minimal turbo at any revs. Reconnected, and still no low down boost as original post.

Have called a local indi for a MAF price but he as Sped has recommended a turbo log to compare actual boost with requested.

Guess I am just hoping it is the MAF rather than a coked up arm and turbo off recon ! Just been quoted £800 minimum.
 

PhilOfCas

Active Member
Nov 2, 2006
478
0
The capital of Yorkshire
Just had exactly (it could have been me writing your first post!) the same on ours last couple of week, local VW mechanic first suspected sticky vanes, then was slightly puzzled that the turbo didn't always come back on when I restarted, anyway, 2 weeks of trying to rev it more than usual to get the actuator/vanes moving didn't fully clear it.

He had car in last Friday for a thorough checkover, everything checks out fine apart from sticking vanes, he gained access to it and the last 30% of the movement of them was stuck, he worked them best he could and got movement back. He road tested it and couldn't repeat the turbo overboost trip out. Basically it's left with me now to keep applying full boost to free it up and see how it goes, he wants to explore this option as he believes all is not lost. The point he is making is that to take the turbo off to clean has quite a bit of labour involved and it may not be a guaranteed fix.

Fingers crossed!

Basically, the problem has occured due to 98000 mile of taking it steady, it's coaked up due to driving like a granny :), the engine has had a very easy life, but it's caused the turbo problem, once the turbo is fixed (either through boost!/clean/replace) I can see the car being as good as new :D)
 

Windy Altea2123

Guest
Am now over two weeks on from the initial problem, but still have little boost until almost 1800-2000 rpm when it goes fine.
Have so far given it a real good thrash in attempt to burn off / free up turbo arm - no better.
Used diesel additive to clean up injectors etc - no better.
Fitted new MAF - no better.

????????????

Given that on this forum people appear to be suffering from similar symptoms with different fixes and the fact that I have spoken to 3 different garages whom have each suggested totally different repairs am still none the wiser and concerned that this will be an expensive case of trial and error.....

Can anyone suggest a reputable indi / turbo specialist in Notts that would give the definitive before I shell out a load of cash.

Also have read about innotec turbo cleaner - does this actually work and is it as easy as they say to use ?
 

Windy Altea2123

Guest
Guys,

Thanks all for the advice and posts.

BUT, have had enough of Seat. Great car in every way except for it's reliability; what with repairs now totaling over £2000 it's time to say goodbye.

Have now got a 2.2cdti Civic; just hope Honda's legendary reliability is true !

Bye for now.