having some hopefully minor issues here, to start my truck has 70,000 miles on it, a mild programmer, doesnt haul heavy and doesnt get beat on constantly, just the usual put it to the floor now and then. it just started VERY randomly overfueling, my first thought was injector(s), but then thinking about it, its not excessive overfuel, its basically just enough to smell it and the tach flutters a couple hundred R's, and it does it maybe once overy half hour of driving. only does it at idle for 10-15 seconds, truck still goes like hell and doesnt miss a beat when you tromp on it, and its not using any more fuel than usual, i have a fuel rail pressure gauge and it shows normal (5k at idle), normal egt's. any ideas?