it's not running very well though! Your symptoms do sound similar to those I once had with the 16ver. Fixed by changing the ECU relay after trying a new crank sensor. When trying to help another owner I donated the realy whcih also fixed his but at the time I started mine without the relay and it ran. Don;t know how it wouild have behaved if I'd let it warm up and went for a drive. But I think the warming up is the key, as if the ECU swaps to a different set up which relies on the relay more. The large relay number varies depending on Dizzy / coilpack / OBD1 / OBD2 so best talk to VW to b