Author Topic: Golf Mk4 1.9 TDI 17965 fault code / VNT Vanes Clean & Repair  (Read 11327 times)

Offline RTechUK

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We have opened a new two workshop bays just for VNT cleaning and DPF issues cleaning and removal

http://sticky-vnt.co.uk  http://removal-dpf.co.uk Midlands Leicestershire / North Wales and Chester

R-Tech VNT sticky turbo vanes repair   http://uk-mkivs.net/forums/t/393599.aspx

In 90% of cases this will stop overboost limp mode, return better MPG and make the car more responsive.

PART 1 > http://www.youtube.com/watch?v=jgqDEBEOF_4

PART 2 > http://www.youtube.com/watch?v=UWyN53N_uMI&feature=related

PART 3 > http://www.youtube.com/watch?v=dhZYCUKOVRc&feature=related

PART 4 > http://www.youtube.com/watch?v=43W7Abmwhhk&feature=related

We also blueprint the VNT fittings and shims to allow for more clearance to help stop it happening again.

I have managed to save around 60+ Tdi owners £1200 each after main dealers have told them they need new turbo unit to stop the overboost.  :happy2:   

When a  1.9 TDI sees 400mb overboost condition for more than 10 seconds then main fuel IQ map reverts to a generic setting for limp mode to reduce the engine power output, but becuase the VNT is sticky the turbo will continue to overspool/boost. 
The constant overspool/ boosdepend on vanes position, but both conditions cause heat build up and can warp / melt the turbine tiops and vanes.  This happend more so on cars running stock mapping and can happen with less than 50k on the clock.


Pics of a VW Touran TDI 55k stock mapping which had the 17965 fault for 6month, this one we could not fix due to the melted parts..lol






I hope by posting this it saves someone splashing out £1200, when a basic £235 strip down and clean will fix the over boost in 90% of common 17965 faults.

Nick Gower
R-Tech 01455 617233

« Last Edit: 11 July 2012, 21:06 by RTechUK »



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Offline RTechUK

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26th July 2011 Job number 1
Stock mapped 2005 Audi A3 2.0TDI 140pd with 88k which has had sticky VNT for 3 months and only went into limp mode 5 times.
End result was melted turbine wheel tips and melted VNT vanes which has resulted in the turbo being a door stop.

We are now doing around 7 VNT turbo repairs each week, I would say 5 out of 10 TDis
 with over 60k will suffer from sticky VNT and will have had a positive overboost fault code 17965.

Pictures below show the results of the:
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-10 - - - Intermittent









R-Tech Customer Feedback / Reviews
http://r-techpower.co.uk/r-tech-feedback.php
VW AUDI SEAT SKODA 1.8T-1.9TDi -2.0TFSI  Tuners

 01455 617233
http://sticky-vnt.co.uk Midlands

Offline RTechUK

  • Forum Trader
  • I live here
  • *****
  • Posts: 3,392
  • Location: R-Tech Remaps
  • R-TECH OFFICE 01455 617233
    • R-Tech Remap
We have opened a new two workshop bays just for VNT cleaning and DPF issues cleaning and removal

http://sticky-vnt.co.uk  http://removal-dpf.co.uk Midlands Leicestershire / North Wales and Chester



R-Tech Customer Feedback / Reviews
http://r-techpower.co.uk/r-tech-feedback.php
VW AUDI SEAT SKODA 1.8T-1.9TDi -2.0TFSI  Tuners

 01455 617233
http://sticky-vnt.co.uk Midlands