I'm having a problem with my 2001 2.0 litre HDi 406 not returning to idle. More often than not it sticks at about 1200 revs as opposed to the 750/800 it used to. Sometimes blipping the accelererater makes it die down to normal,othertimes it just won't budge.
One garage said the EGR valve was sticking,and needed cleaning. Elsewhere I read that the idle air control valve could be a possible cause. Any help greatly appreciated.
Les.