tonyholbury Posted May 19 Share Posted May 19 This post was recognized by Volkswagen Owners Club! tonyholbury was awarded the badge 'Great Content' and 35 points. I had a problem when my 2007 1.9tdi Touran went into limp home mode. The tester said OVERBOOST Crawled under car and pulled on the Turbo boost arm and it was free so not jammed by soot. Bought a second hand vacuum control box, (NOT the N75 as stated in some you tube videos Removed battery for access To remove box undo four torx screws, then slip off two clips on the hose plug end, finally unclip the control electric plug, reverse procedure to refit. Only pain in the backside was the torx screwsm, you cannot see all of them and you need something like a 1/4 drive with a short extension to get in their and apply enough pressure to undo them, mine were tight. As a belt and braces man I also replaced the mAF sensor you need a 5 point security torx to undo these WHY SECURITY SCREWS???? Anyhow all done and after warmup engine will now, rev beyond 3000rpm, all fixed. One question This car is supposed to do mid fourties MPG Only Does 36 which is crap compared to my last diesel a KIA Carens which would do 42+ PS put this in the newbie section as I believe over boost is a fairly common problem with all VWs with variable vane Turbos PPS use a can of EGR/Turbo cleaner once or twice a year, most of them get jammed by soot build up PPPS anyone want a brand new N75 valve?? 1 Quote Link to comment Share on other sites More sharing options...
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