well the temp here has been in the low 30's, and the truck has been a little on the (i dont want to wakeup side). it will fire up on the first cycle of the gp's (and yes all are good) but doesnt run on all the cylenders. it takes several seconds of rough running and the nice smell of raw diesel and lots of smoke before it straightens up. i think i have several injectors that are dripping diesel instead of spraying it, and i do here a slight knock in the engine and also in the exhaust. what is yalls opinion on this matter?