1) The car was stalling randomly at idle. I'm pretty sure it was
the clogged PCV valve/plumbing.
2) I also yanked out the aftermarket remote starter/immobilizer that came with the car:
I've never used it, but it was sometimes giving me the impression that it was interfering with the engine "run" circuit.
Since cleaning the PCV stuff and pulling the remote, it hasn't stalled again.
3) I trimmed an inch off the bottom of the air dam. Hitting unavoidable frozen snuds at 80 km/h is not condusive to long-term viability. Coroplast is brittle when it's -25 C / -13 F:
Above = snud damage.
4) I added the garage entry + fuel log for the car. It's sitting at a paltry 50 MPG! Terrible!
Though it has been a frigid winter. And circumstances have had me driving it faster than I typically drive the Firefly (I rarely take the Flea on the freeway, but I've had the Metro on the highway at least once a week in the last month).