Picked the car up today and drove the hubs to the subway station. As I was passing my house on the way to work, it started making the chugging sound again, so back to the garage I went. They think it needs new plugs and a new ignition cable.
Needless to say, I am working from home again today. Don't get me wrong - I am grateful to have a job where I CAN work from home, it's just frustrating to be forced to. As much as I am able to get done, I know there will be so much more waiting for me when I finally get into the office.