2004 freelander
2.5
Replaced all of the plugs and one coil which was damaged

It is pulling a manufacture code manufacture control P 1470 and P 1472

I replaced both VIS motors

I verified proper fuel pressure

I have a genuine Land Rover mass airflow sensor on the way because the mass airflow sensor is faulty and the vacuum lines all of the plastic lines on top of the engine I have those on order because they have a significant vacuum leak

However I hear a little bit of a rattle at idle and it’s got a very loping idle
 it’s got a random multiple cylinder misfire with a few confirmed misfires on cylinder one and four and occasionally cylinder two even after changing the plugs and the VIS motors

So I’m starting to think if anyone has any advice or insight on the runners and the springs that sit beneath the balance VIS the one that the connector faces up towards the hood

Please let me know what to check I am a technician I’ve never really taken the liberty to Tear a Land rover down but it’s not something I am not capable of doing
I’m confident

If in fact the runners inside the manifold for the upper Plenum are bad my best option would be to replace the intake manifold Plenum?

2004 2.5L
bank 1 front 3 cylinders 1,3,5
bank 2 rear 3 cylinders 2,4,6