Hi all. Not been on in quite a while. I'm getting what I believe to be the start of something failing. If I am driving and accelerate in gear with say anything over half throttle, get to 3krpm+ then change gear straight into neutral and effectively Coast! the revs drop down to ~600 then blip to ~1200 and then sit at the idle (~750). This may just be nature of the car, I don't know. My my initial thought is the PCV valve starting to fail, my car is 57 plate S3 on 43k miles and according to all my receipts from the previous owner, it's still the original valve. I have started the car and pulled the dipstick, the idle stays fine but if I rev it slightly it will hunt ever so slightly before resting at ~750rpm. Has as anyone got any thoughts or ideas on this of where to look for the cure? thank.