well, after doing the always on mod, the SC pump is on and pumping. I know that much. pulled a plug and they look like the original plugs NGK & MB Mercedes Benz and it looked like it needed replaced. I am working on getting everything serviced in hopes I will find the issue along the way. It never has overheated so I assume the fan is working, will check. air pump code clear when I found a breather hose had cracks . Oil leaks on the motor so been getting to the bottom of that.. thanks