i have a 2003 2500HD 6.6L. first thing in the morning when i start it i have no porplems, but once the engine warms it starts to smoke white only at idle. like i said i have a P0101 code and a P0401 code. i know what the codes mean. i dont know if the MAF senor is causing the smoke or not. the only thing i have done so far is to put fuel injector cleaner thru two tanks of fuel so far and no luck. i hear it could be the fuel injector pressure regulater but i have no clue how to tell or know where on the truck it is. the truck has 83000 miles on it.