Q: Revs real high when I leave it idling

asked by on November 06, 2015

My 2011 Toyota Tundra has a automatic transmission and only about 17,000 miles on the clock. When I leave it idling it will randomly increase revs about 700 rpm and then gradually bring that down over a couple of minutes. Not sure what to do and not sure if this can even hurt the truck. What is happening here?

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