Lots of crazy stuff goen on with my truck. Weirdest thing is this fast modulation from the engine when maintaining a particular speed or rpm. It sounds like someone is rapidly changing the position of the throttle. Truck runs fine otherwise, matter of fact it runs better than it has in awhile. When cruising at 65-70 mph running about 2350 rpm it doesn't do it. You can here it slightly when idling and it has warmed up, doesn't do it at all when cold. Been having trouble starting it when it sits for about 24 hours to. And today i noticed the battery light flickering when under hard accelleration. Could this all be the result of one issue in the wiring somewhere?