@N8P
Here's a quick visual check, no tools required, just a helper.
Open the bonnet, and locate the Flap Actuator, at the left hand side of cam cover, top of the engine
Briefly run the engine (to ensure you have stored vacum), then switch off. Observe the actuator shaft, it should be in the up position, held by residual vacum.
Ask your helper to turn the ignition to the first position, (ignition on only, not to start).
The actuator shaft should now drop approximately 15 mm, as the vacum is vented.
(This, if all is well, will drop the flaps to the down, inactive, position).
Now, ask helper to start the engine.
As soon as it starts, the actuator shaft should move upwards, again about 15 mm.
(This should lift the flaps to the up, active position, where they will remain until you get to 2800 - 3000 rpm, when they will drop down, to maximise intake cross section and air flow).
Let us know what you see, with pics of possible.
Mac.