Like the title says, I put my dp tuner on and the truck started right up and ran fine. I moved the switch (old round switch) a couple of notches and it ran fine. While I was picking up my trouble light and socket and shutting the hood getting ready for a test drive it quit missed a few times and quit. I tried to start it back and the ses light was on and the water in fuel light was on which has never been on before. I pulled the chip back out and rubbed it some and put it back and it done the same thing except it did not run as long. So I pulled the chip completly and it starts and runs fine. I was afraid to clean anymore on the terminals because this is where the superchip was plugged in at and it worked fine and the terminals were already showing some brass. Sorry for being so long winded but I wanted to give the experts plenty of info so maybe somebody can help me.