Ok i have ran my truck about 2 gallons and now i am starting to have a engine problem. On start up the engine will rev pretty high,, i have to jocky the gas a little than it idles right, but then after it warms up ill take it around the yard for a couple of min and come to a stop than the engine revs up again and slowly idles down till it shuts down. The truck will run fine as long as im in the gas just when i stop, the idle is set correcty and all my carb setting are right, to me it seems like something to do with the fule tank pressure, PS i never installed the gas tank rubber groment that came in the upgrade kit with i first got the truck. Any help would be nice