When the engine is at idle it has a slight miss, I can pull the plug wire off each cylinder but the Number 2 cylinder has the least effect on the miss but you can tell a slight difference once it is unplugged. The check engine light is on?? I have checked the vacumn hoses, wires, etc. Also if you open the throttle rapidly, it bogs down, if you ease the throtle open it will rev on up. When it bogs down I can feel air coming back out of the breather! Doe anyone have any suggestion? Thanks in advance!!