Miss and engine light on after running high idle setting

[Tommy69z]

Tuesday I let my truck run on the high idle setting for about 10-15 minutes to keep ac cold, had some meat in car and had to make a stop, anyway, when I came out the truck was missing and the light was on...I cut it off a few minutes later and restarted, the light went off, and the miss gone for the next five miles home. Today, the miss is back and the engine light??? Any suggestions???