grey smoke
 

hey im new to all of this. i just bought a 94 power stroke with a zf5 speed it has alot of miles like 300 plus it has a super chips programer and straight exhaust any way it smokes grey somtimes if i let it idle then drive is that normal

You're going to have to be a bit more specific. It just does it at idle? On a cold or warm start or doesnt matter? Have the injectors ever been touched? Is it a slight haze or thick smoke?