that's odd - I have a white screw on mine that was downright fubar'd when I bought the engine. I thought all IACV's looked like mine. The number on mine is 237815j210 acff0055. Wish I had a picture right now. And comparing to the one in the photo, mine has two wires coming off the ficd portion (purple plug in photo above) between the plug and the ficd valve. Weird.