Having a few problems with the car, ive got a very lumpy idle and the car keeps cutting out when coming to a stop at a junction (the engine just dies) ive changed the amf and that didnt work. it comes and goes it will either do it all the time or not at all but to day has been really bad, cutting out at every junction. Now to top it all of i have been getting turbo chatter. I have an open airfilter and its been on for over a year and had no problems with it and im using the standard Dv, any help???? are these two things even related?