YellowCar

For a start the one for the diesel vrs goes back much further as it's for a diesel not petrol. Not a problem in itself as it's fixed to the side pieces. However, as said above I seriously doubt it because surely the Fabia is narrower wheel to wheel, which would bring side sections closer together. And as for fixing points being in the same place...
From what I've seen of my Ibiza one, don't think so. Leon yes, golf 4 yes, bora probably, Toledo probably...

Exactly, and if it's ticking it's working

Hi, doesn't sound like actuator, would probably be more gradual (drop off in boost).  Sounds like coil/s to me, however it could be many things (coolant temp sensor, n75, maf, wiring on coil harness etc), check your plugs too.  As the eml flashed under misfire see what code was logged with vcds, if it is coils it could pinpoint a cylinder.  Did this car undego the recall for revised coil packs?  Could be worth ringing your local dealer to find out and getting 4 free new ones if it applies.  In the meantime try and drive around the problem, if its misfiring you dont really want unburned fuel in the system.

Evap can? It sends fumes from the fuel tank into the engine for burning as emissions control. It is known for clicking, if it's clicking it's working. It's a black canister just below the coolant header tank. On top you'll see a hose going over to the throttle body. When you hear the clicking put your thumb on top of it, see if you can feel the rhythm.
Also, our cars aren't known for quiet injectors. I hate listening to mine ticking over, doesn't sound particularly nice but when it's running well its sweet. And still sounds like a bag of busted spanners under the bonnet.