hi ! its allways difficult to diagnose faults without seeing the vehicle . have u cleaned out the throttle body and butterfly ? has that engie got an idle stabilzer valve (cylinder on top of rocker box ,piped into air hose and has multy plug on one end ) or u could have a word with my mate mark at hereford volkshop ! not much he dont know about vw s 01432 277046
ade
October 2009