I have an 03 passat wagon that I have to cycle the key several times before it will fire. When it does fire up it take awhile to be able to revup. I've replaced the fuel filter and ordered for and temp sencer.
Good start. On the B5.5 1.8T the N80 sits on top of the airbox on the passenger side engine bay.Check the N80 purge valve (I have no idea where it is on that engine). It may also be the cam position sensor. Can you get the car scanned for codes?