Sat with old gas for an extended period of time? How long does the pump cycle? Perhaps a ride will to trip any codes that might lead to your gremlin.It is still a bit hesitant to start. I have started it 4 times now and the best way seems to be to turn key on, wait for everything to cycle thru and hit the starter and hold for 2-3 seconds and release. Then turn key off and back on and repeat and it fires right up after that. It has a bit of a rough idle for about 3 seconds then smooths out.