I was putting in my new light bulbs a few days ago and it gave me a chance to check out the little trap before the air filter. Boy am I glad I did. It was filled to the top with wheat chaff, dead bugs, small rocks :shock: , grass, sticks and all kinds of other stuff. Frankly I have no idea how air was making it's way into the engine. Went out for a drive right after cleaning and acceleration felt smooth. I wondering if the motor was starving for air, thus my slight surging problem?