I played around with the smoke switch, and couldnt get it to work but while doing this I found one thing you could do that was the same thing. It is kinda a pain but with the truck running unplug the map sensor and then plug back in. When you get back in your truck the cel will be on along with the lighting bolt light. With edge on 6 and mp8 turned up all the way take off. You will instantly now if it worked or not. Some times I have to unplug the sensor up to 3-4 times just shut the truck off and try again tell it works. You will lose power but it will smoke pretty good as you have seen from my videos. Sometimes after you do this the truck will keep doing it on its on for a few miles, just keep reseting the cel and it will eventualy clear its self up. Any questions let me know.