can anyone help,
lately my s2 has been idling lumpy and when i slow down from speed to stop she cuts out,she only seems to do this when cold and has only started to do this since the weather has become really mild and warm.when she warms up it does'nt seem to do it although the idling is not smooth.can anyone give me an idiots guild on how to tackle this problem.when driving the car it is fine and there is no loss of power it just seems to be when she is stationary.i have in the engine bay a oil separater,pace intercooler,dump valve,swirl-pot.
i would be very grateful if someone can shed some light on this.

 

check it without running your dumpvalve, and check the breather pipes on the rocker/oil seperater