MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: R-tech-Nick on March 02, 2011, 01:55:00 pm
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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 >
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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
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fuu260%2Fr-tech-rr-graphs%2FIMG_0582.jpg&hash=fb25b0177822ce9f6657f1df68dd14d37903e838)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fuu260%2Fr-tech-rr-graphs%2FIMG_0548.jpg&hash=165b893788629488f4e7e1c5e5ef02b00b089e5a)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fuu260%2Fr-tech-rr-graphs%2FIMG_0552.jpg&hash=c781f6e3e94e519bd062936b988927fd248d77ac)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fuu260%2Fr-tech-rr-graphs%2FIMG_0586.jpg&hash=55131e1e50cef43ecfbb712246d08494693a21af)
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