UniquEd30, that video reminds of the problems I had ('08 regular GTI), before my PCV failed. Mine did start to climb to 2k revs and with a blip of the throttle the rev's returned to normal before waiting a couple of seconds and started to climb again. Vag Com showed nothing!
I did the dipstick test and it passed, once it started to whistle (confirming the issue) I replaced the PCV valve. I paid £29.99+VAT (minus the gasket etc) from TPS (https://tps.trade/ - I don't believe all of them will sell to the public) back in July so not a great expense if you wish to take a chance.
The chap at TPS who served me mentioned they do have a lot of problems with one of the pipes that sit at the back of the engine that connects to the PCV, I think its the metal one that is shown on 'PCV update' posted by pudding. He said the latter cars have a revised pipe (mine was one) which aren't so problematic.
Do you have a part number of what VW changed?
Just been through the service book receipts and I can confirm a Turbo boost hose was supplied and fitted by Beadles VW Maidstone. I am assuming this is the parts number: V1K0 145 832 P. This was changed on 27/07/16.
Today I have noticed a short hissing(possibly a whistle) type of noise coming from outside the window for a period of 2-4seconds. Usually after putting my foot down a little.
So you're saying my PCV could possibly be on its way out even though no fault codes came up as well as passing the dipstick test?
That hose connects the intercooler to the turbo discharge pipe, so it's not part of the PCV plumbing. Do you get the noise in boost, or when you back off the throttle?
Everyone has a different approach to a new car, but me personally, I replace everything whether it's needed or not, so I can start again from a clean slate.
Within a week of buying my ED30, I replaced all of the above items I listed, along with fresh oil + filter, spark plugs, MAF, coils, air filter, the lot!
I take it to VW to get the rubber service stamps (otherwise you get too many daft questions and low ball offers come resale), but I do the oil and filter every 5K anyway.
It's been a VERY reliable car from keeping on top of the maintenance