Just got a little four cyl. truck and when you turn it off it keeps wanting to run. I think called dieseling? But anyway, I have done nothing to the little truck yet. What is it that I need to do to get this little truck to quit this? It has a 2.2 five speed. It has a weber carb on it and the motor i was told only has 150,000. This truck starts and runs fine. I have been told to run all kinds of things through the motor. What do i do to it? And is this not caused by a carbon build up on the valves or somethin'?