My '89 F150 in my signature.

Yesterday I was working on the house taking down my christmas lights all the way up on top, and I have to have my 40ft. ladder on the box of my truck to reach. Anyways, I left it running this time (usually I shut it off) to work where I am, then move side to side.

I left it running and after idling for about 10 min, it randomlly almost stalled, revved back up and went on high idle for under a minute.

By then I was done and I moved it to one side of the driveway, left it running again, another about 10 min, it stalled out. Running nice and smooth and out of nowhere just bogged, reved down and died.

Any ideas???

Starts right back up like nothing happened?

Wasn't close to overheating or anything.