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When the truck is warmed up and the weather is HOT outside, it seems to load up with fuel. it pops and "backfires" when accelrating until it "cleans itself up" then will run fine until idling again then it starts all over again. NOW when the weather is a little cooler outside it doesnt seem to do it as much. I was told I should take a look at the Fuel pressure regulator. Does this sound like it may be the problem?? and if so, is there any way to check it?? THANKS!!!