why does it miss & stall assoon as the temp gauge starts going up

What is your question?

it runs great when it first starts for about 3mins. when the temp gauge starts to go up it doesnt want to stay runnin.press the gas pedal it stalls out. will not stay runnin under 2000rpms unless u feather the gas pedal & misses real bad or has a lopeing sound, let of gas stalls right out. if i hold the pedal anywhere above 2000rpms it doesnt miss at all but let off the gas it stalls out. then u have to feather the gas pedal to start it again.it runs great when it first starts till it gets heat