Just had this on my cabby 2.0 8v and is quite common. You'll need to check and clean your throttle body. I used a tooth brush and carb cleaner and didn't take it off completely but just disconnected the inlet side. Also stripped and flushed the breather hose and cleaned through the breather filter and it ran like a dream. If you are grafting in a donor piece of metal from another arch lip, use a joggler to offset the edge to get the best finish and strong bond.