to be honest i give all respect to mk2 owners, and infact all old vw owners, be it old polos jettas ect. ive had a 1.3 a 1.6 driver an 8v Gti and now ive got a G60 but unlike you i dont go around with a chip on my shoulder, and before you start yaping on about 16valves la la la ive got a car with an ABF in it so i kind of know how they work as well.
as for you, your not making many friends around here
as for the original point of this topic, hope having the hot air feed stuck open sorts your problem mate like i say it sorted mine a few years back and then in the warm weather i just removed the screw.