My 1.8T has started in the last few days to have a lumpy idle when it starts up. The rev counter is not flicking around alot, but you can feel it in the car - lumpy through the vibrations. Then, after about 3 or 4 minutes the idle goes from 800rpm to 1100rpm and stays there - not lumpy but obviously high. Any ideas what it could be? Turning the car off and straight back on it does the same - and it doesn't matter if it's cold or hot. Cheers!