So today after about a 30 mile trip. I get back in the truck and crank it up and all of sudden, she is idling VERY low...I threw her in N...no help....so I got out and checked all the obvious under the hood. Everything is nice and tight. SO fast forward....went fishing this evening...coming home she started doing the same thing. I pulled in my driveway and she about stalled out....not sure what is going on...I need HELP!!!