ive been having some unusual qwerks with my 6.2 lately. it seems like when im just crusing down the road goin 45-50 my headlights and dashlights pulse. i look at my volt guage while this is going on and the needle is just about to the yellow portion to the right in the guage. the needle moves back and forth to the pulsing of my lights. do you think this is an alternator problem or something deeper in the wiring. just to let you know the truck sat for two years before i bought it. another issue is that the motor surges sometimes when im just pulling out or goin up a hill. there feels to be a big boost of power for a little then goes away. it only happens when the throttle is in a certain position so im thinkin the injector pump is takin a dump. the pump does leak out of what looks to be the throttle shaft. i changed the primary filter but that didnt help any. any ideas??