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Author Topic: Golf Mk5 1.9 2.0 TDI 17965 fault code / VNT Vanes Clean & Repair  (Read 9662 times)

Offline R-tech-Nick

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    • R-Tech Performance Tuning
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 >


PART 2 >
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PART 3 >
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PART 4 >
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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 edc16 1.9 2.0 TDI see 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 2.0TDI 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: March 02, 2011, 02:48:59 pm by R-tech-Nick »
R-Tech Performance Tuning & Rolling Road Centre
Custom ECU Remap Tuning Specialists 
1.8T - 1.9TDI - 2.0TFSI - 2.0TDI - DSG               
Hinckley Leicestershire LE10 3BY
01455 617233
We aim to be the best not the biggest!!



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www.sticky-vnt.co.uk www.removal-dpf.co.uk