I have the 2003 2.0 Turbo with a dodgy idle on it. As far as I know it is completely standard.
Took it to my local garage and they said they plugged it in to the computer and it told them to change the solenoid - £193 later and still the same problem. Took it back, they said they cleaned it all out, still the same problem.
Also a friend of mine mentioned a hard pipe running from the intercooler, he said over time the rubber one can soften and therefore lose performance? When i squeezed this pipe the revs really drop away, then it hunts again.
Also when I accelerate i notice a little drop in acceleration then it picks up again?
Can anyone help me?