Thanks for showing an interest Passat.
The engine is a 2L FSI 110KW
K1 ?
I did use a Cam Shaft locking bracket.
I've returned the timing belt to top dead centre on the timing belt/crankshaft marks. I'm using a probe on the no. 1 piston. As the timing marks on the crank pulley/engine tin wear are a bit ambiguous. Although are looking much better with this setting.

I have thought about air leaks around the intake. The all look/sound pretty good. Tried a few hoses off and on with no charge. Have not used a can of quick start. Or tried fogging?
Standing back for a minute.
Did think of putting some fuel conditioner in the tank.
The engine does run suprisingly good. Plenty of power. Just way too rough at idle. And an engine fault light .. did go into slow down on the highway when I took it up to 5k overtaking, bit embarrassing...