have you checked the throttle body inlet for leaks? common problem on C20 XE's, not sure if its got an EGR valve same as the X16 XE this might also be causing problems? my Gsi had a massive idling problem, would bounce from 1k to 3k consistently then stall when slowing down, i changed iacv, blanked EGR valve off and changed throttle body inlet and still had the same problem so ended up getting shot of it cos spent too much money on sensors

Sarah

try migweb theyre usually very clued up on XE novas anyway