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I wonder the high revving was coincidental. It's felt a bit odd for a while. Sound in particular when starting it sometimes is very noisy rattly until I change gear (which, from reading skoda forums this morning, marries with a timing chain issue).
It's an automatic. It sometimes has trouble wanting to change up a gear in the low gears - if I'm coming away on a busy roundabout and wanting to accelerate quickly for example it'll stick in 1 or 2 and rev more than I'd like before switching to 3 and beyond. I usually do the direct gear select thing to keep on top of it. Going down very steep hills (a couple near us in particular) it always want to overrev and I'll either brake or change gear to manage the revs (this may be a terrible idea).
The only bit I'm not sure about here is why did it rev higher?
If the chain slipped then the cam and crank shafts are now out of alignment. That wouldn't make the engine rev all of a sudden, if anything it would bog down, misfire, stutter etc.
A rev going up a step hill says clutch slip to me.
Now it could be the unexpected rev from a slipping clutch caused a jump in timing chain but the timeline (pun kind of intended...) doesn't match up to me.