could it be the Crankshaft sensor , Ive read a few incidents online that sound similar to my issue ..?
does the MK4 have a 16pin OBDII compliant plug and system .. I was was looking at an ANCEL VD500 unit to buy.
can you point in the right direction for a VCDS please, not sure I'm looking in the right place as the ones Ive found from Ross-Tech are £300-400