I drive a small automatic car. For the most part, it struggles a bit with steep uphills, and picks up speed when going downhill. That’s to be expected.

But then I noticed some downhills actually slow it down. I’ve noticed during a two-hour motorway trip I often do to visit family, there are some specific downhills, not all, just some, where my car always slows down and I have no idea why.

Ideas?

  • jws_shadotak@lemmy.worldEnglish
    2·
    1 year ago

    Are you using cruise control to set the speed? If so, it could be engine braking to keep it at the desired speed. Some cars do this, some don’t.

      • jws_shadotak@lemmy.worldEnglish
        3·
        1 year ago

        Weird. If your RPMs increase during these slow downs then it’s from engine braking.

        It could be that your car is downshifting for the uphill and then remains in that lower gear for the downhill, causing unintentional engine braking.

        • MothraOP
          1·
          1 year ago

          Hmm. I’ll pay more attention to the RPM next time. If there was an increase it was nothing crazy, but I can’t recall for sure. These slopes don’t come immediately after one another though. Thanks for the answer