R-Tech VNT sticky turbo vanes repair
http://uk-mkivs.net/forums/t/393599.aspxIn 90% of cases this will stop overboost limp mode, return better MPG and make the car more responsive.
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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.
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