Recently my 1999 1.8t Agu has been making a noise after start up. Sounds like the starter motor not disengaging. However, the noise seems to be coming from the right of the head of the engine. After its started it idled very low, if the car is revved, the car either cuts out or revs to a maximum of 1500 then drops the back to 1500 then drops. Eventually it will cut out. The car is not drivable and its stuck at my workplace. Any help please?