I have an '05 Lancer OZ Rally for almost 3 years now. This summer when I started using the AC I noticed it would shake at seemingly random intervals while idling. I also noticed that I would occasionally get a hiccup while accelerating to pass someone on the highway, again only when the AC is on. I've narrowed it down to AC related but I want to know if I should take it in for costly shop time or if it something simple I can do myself?