Hello folks, I have been doing a lot of research throughout the forums to see if I can dtermine whats casuing my issues, to no avail.


I own a 2013 Q5 (2.0T FSI) with a little over 39k miles. The problem I am experiencing is the following. When driving the car, and coming to a stop, just as I release my foot from the pedal and the RPM get down to ~ 900, my car begins to stutter and the RPM begins to jump from what appears to be the normal idle speed (900 RPM) down to around 600 RPM and back up again in a infinite loop. Obviously, all the car begins to shake feeling as if it is about to stall (but never actually does).


No CEL light is on.


I have read a lot of posts with similar problems and blaming the following:

•PCV Valve
•MAS
•Vaccum leak
•Ignition Coil(s)

The thing here is that all posts I have found relate to the issue being present at Idle. My car Idles just fine when coming to a complete stop (by applying the brake). My issue seems to be more frequent when the car is rolling down (ie going down a ramp). I'm experiencing no rough idle at startup, by the way.


One more thing, I recently changed a faulty O2 sensor and this problem appeared a couple days later.


I know that there are a lot of options to determine what is causing this, but I would like to get opinions on these before I begin changing out expensive parts!


Thanks for your input!