My s2 have just had a new head gasket, and it ran perfectly the first two days..
But now... when it fires up, it either hunts between 400-1600 rpm.. or it just cuts off unless i keep the foot on the pedal and keeps it at around 3000 rpm.. but still runs rough.
it does any of the abow, until its warm, and then idles fine.. it does not seem to have a leak from any of the hoses, and all the plugs are connected correct.. i have also tried unplugging the cold start valve, but then it wouldn't start..

Pleas help, i have no idea how to get this sorted??

Cheers.