I still have a prochem bruin 2. w/Kohler 3 cyl. from when I used to clean carpet. My son uses it to clean my carpet at my home. his brother's, and his sister's, along with his own. Problem he has taken the coil out to use in an old car that he is playing with. Now he put the coil back into the machine and now there is no spark. I believe that the wiring is not correct. Could someone give a diagram of where the wires come from. We do not have spark now. It was running fine before he removed the coil.