jws_shadotak@lemmy.worldtoNo Stupid Questions@lemmy.world•Why sometimes my car slows down going downhill?English
3·
1 year agoWeird. 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.
Possibly from allowing sunlight into the building which heats the interior. Air conditioning must work extra hard to overcome the heat.