So I managed to grind enough skill to hotwire vehicles and when I did that vehicle didn't have enough battery charge to actually start, so it just made this gear change noise (I think) and the engine status would become orange (starting) then go back to gray (off) but I wouldn't hear anything other than that gear change noise, no engine rev no nothing. Then in a few seconds I wake up with the nearby horde of zombies coming towards the car trying to get a chomp of me. Thinking that it was a weird coincidence I decide to try starting the car again which resulted in that gear change noise again and the nearby zombies getting attracted to the car.