Green’s Dictionary of Slang

motor v.

1. to get started, to go well.

[UK]B. Beckham My Main Mother 103: On to the nitty gritty [...] We’re shifting some well-oiled gears now, we’re ready to motor, jim. Ready to hear about Jeff?
[UK]K. Sampson Powder 26: From now on they could get things motoring, starting first thing Monday.

2. (orig. US campus) to move quickly, to leave.

[US]D. Waters Heathers [film script] Great paté, but I gotta motor if I want to be ready for that party tonight.
[UK]N. Barlay Curvy Lovebox 67: Less mo’or.
[Aus]L. Redhead Thrill City [ebook] [I] motored back to Victoria before she could up and leave.