Took the ISCV off, and it was disappointingly clean inside. I gave it a good blast with carb cleaner just in case, but it's not made any difference.

It's a 70K car that never been messed with, so if the ISCV is anything to go by I doubt the inlet will be gunked up.

Went for a drive to warm it up and it's odd as it drives perfectly, but when you stop the revs 'hang' at just under 1500rpm for about 3 seconds before dropping down to just under 1000 (still feels 100rpm or so too many). It's more annoying than anything else.

Does that still sound like it could be PCV related before I get it up in the air?