run on fumes

verb2

1. •
   To operate a vehicle that is low on fuel.

   • We were running on fumes by the time we arrived, but we made it to the next gas station.
2. •
   (figurative) To operate with few resources, or be physically or emotionally overworked.

   • The organization had been running on fumes for months, so it's not surprising that they closed their doors.