I was out pushing some dirt today and it ran good for about an hour or so then It sounded like it was flooded and would run reall rough. It wouldn't start easily and had to wait a couple hours before it would start and run again. Any ideas what it would be??

 

when you tryied to start it did you hear the fuel pump kicking on? make sure the gas tank isnt under pressure by realeasing the gas cap and if you hear pressure release check for blocked or crimped vent lines.

 

My 2006 450 would shut off when the headlights were turn on............This was do to the Solid State Circuit Breakers in the ECM were faulty thus, causing the Quad to shut off for protection.........With the key turned to the full off position and .........then it would start again.....

Not sure if this trouble can happen with the EFI.....Do you have the Sure Power Module?
And if you do was the up-dated one put in?
.......Thanks.......Caper........