I am lost. My 2008 Honda rancher 420 is stalling. It drives good when it first starts up and drives fine. A few minutes into driving both the thermostat light and F1 lights illuminate and it stalls. It will not start back up until it cools down. But really it's not hot at all, stalls after a few minutes. The problems I am experiencing points to the fuel injector and fuel injector relay. I replaced both and still have the problem. Any help would be appreciated.