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Polo 9n3 1.4TDI high idle

Posted: Sat Mar 02, 2013 7:44 pm
by D_toland
Bought a 2007 polo 9n3 1.4TDI, when I start the car sometimes it idles at 1200 rpm after a bit it'll drop to 900 I hooked the car up it had alternator fault up so got it tested its 100% so probably faulty wire also showing was crank shaft sesnors so put this into it £90 still high idleing, if I was driving and I would clutch the car and brake the idle stays high then I release brake it drops to normal any ideas ? I've also replaced turbo in it. Thanks

Re: Polo 9n3 1.4TDI high idle

Posted: Mon Mar 04, 2013 3:48 pm
by alexperkins
What do you define as high idle in RPM?

You may have a split or disconnected vacuum hose

Re: Polo 9n3 1.4TDI high idle

Posted: Tue Mar 05, 2013 5:23 pm
by Ladiesman_317
sticky idle air control valve?