Leaderboard

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??

Other wise quickest cheapest fix is use a spray EGR/TURBO cleaner into the air intake followed by a can of EGR/TURBO cleaner into the tank, but first crawl under the car and check the actuator arm to the Turbo is not stuck, if it aint stuck, then clean then clean or replace the MAF sensor, (quick and cheap) followed by the vacuum control box behind the battery, I did all three and it was cheap under to run cleaner throught the system followed by changing the MAF (£20 for a cheap one) and £30 for a second hand vacuum control box Plus £15 and £26 for a spray cleaner and a can of JLM into the tank. Other thing to check is of course the vacuum hoses, if its got holes in it no vacuum, no vaccum no control over either the Turbo or the EGR valve.

Also see OVERBOOST/LIMP HOME on the newbies section, just posted on another problem that can screw up yer turbo