Engine revs by itself after neutral ?!

[Flavor 987S]

Originally Posted by Lacostas

Hey guys (again),
It seems my car is doing something strange, so I'll need your advice

I was driving normally and today I noticed something weird. Let's say I'm on 3rd gear, and then I put neutral and slow down. The revs are falling to normal RPMs but then it's going to 1.5k or something, by itself. If the car stops moving, the revs are back to normal RPM again. I recently had oil and oil filter changed and Porsche said its a well maintained car. Also, there is no engine light or error code and my gas is always 100 Octane.

EDIT: It only happens if the car is moving with neutral. If it stops, the revs are falling to normal


Any ideas ?
Thanks

Originally Posted by Lacostas

Thanks guys. After all it was an AOS issue. I had it changed on Official Dealer for 145 Euros. Just in case anyone else had White smoke on startup and Engine light and auto-Revs.

You said earlier there was no light. Now you say you had a CEL.

You also NEVER told us you had white smoke (which does NOT alway mean AOS).

Glad you're fixed.