I have a EX-L 1.5L Turbo and I see the tach going up and down 50-100rmps over and over sometimes. You can set the cruise control to say 65mph and you feel the car when it does it like someone is putting on the brake just a little off and on. The speed stays consistent and you can see the tack surging up and down. Like it's trying to figure out what rpm to use. It happens more on slight grades uphill. Kind of annoying as you can feel it in the motion of the car.
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