My car is a 2010 WRX with 21k miles on it. Recently maybe 100 to 200 miles ago my car began to shake while in idle. It started doing it for a few seconds then stop. Now it does it more frequently and shakes more. Its not normal at all considering i know what the normal "Boxer" shake is. On top of this the rpm will drop below normal while idling and the car will almost bog out then the rpm go back up to normal, then above normal then back down to normal. This doesnt happen as often but its still occuring. The computer hasnt thrown a CEL so that isnt a help to me. Yesterday while the car was shaking a bit i pulled into a garage opened my hood and saw the engine moving more than i believe it should. I dont think the engine mounts would have gone bad already,and if it is that, whats up with the rpm jumps.
Any help would be a great!