I own a 2001 lby duramax and have recently replaced the fuel regulator and all the flexiable fuel lines in the valley. I am now noticing classic signs of injector failer, white puff of smoke at start up, fuel knock when decelerating. The odd thing is it dose not smoke at all the time nor dose it knock all the time so my guess is the injector is just sticking open. Im in a bind because im sposed to be going to wyoming next weekend and i wont have time to tear into it before i leave and i cant afford the stealership. Any sugestions or ideas would be helpfull? Should i drive that far with this possible Problem? There is no signs of fuel in the crankcase that i can find.