my mk5 rs 2000 wont idle properly, if you rev it for a about a minuate it will just about idle but its irratic and trys to stall. if you turn it off and start it again it wont idle till you rev it for a about a minuate again. its got a brand new idle control valve and throttle position sensor also a new air mass sensor and absolute air pressure sensor, and iv checked the wiring best i can,