So i got an Audi A4 B5 1.6 1996 with AHL maschine and i have an issue with the rpm when i drive and change the gear it goes slowly to the idle rpm range.When i press the clutch it goes a little bit beyond the current rpm and then slowly to the idle rpm.When its colder it works normaly for about 1-2 minutes.I dont have issues with starting the engine it starts even on -15 celsius.There are no fault codes.