check your owners manual Bob, look under (I think) performance settings ie-economical or sport. My car does the same ('18) when in cruise and going down a hill it will use the transmission to downshift forcing an engine brake to keep it on the speed you've set. Possibly a different setting such as "sport" mode would allow it to free idle down the hill... ???... let us know how you did, it is annoying, but may be just how the engineers at Hyundai designed it.2017 santa fe sport
is there a way to turn off the deceleration thing the car does when in cruise going down a hill ?
the engine increases rpms