Blackfly Down - FIXED - thanks.

[MetroMPG]

Sorry, couldn't resist the thread title.

Apparently I've been boasting too much lately how trouble-free my Fireflies have been, and the universe took note. The Blackfly took ill suddenly today, and I'm out of ideas on what could be wrong.

Here's what happened: was out getting supplies for the tranny swap. On the way home, after bump-starting the car at one point, it started as usual, but running really roughly. So I quit codfishing and just pointed for home. Mileage on the SG plummeted to 25 by the time I got in the driveway.

Black sooty smoke is coming from the tailpipe, even at idle, and it smells to me like it's rich (duh).

The CEL is not on.

There was one code stored in the computer, which may or may not be related to the problem, but I'll say it anyway: it's for the camshaft position sensor, AKA the distributor pickup coil. My kill-switch is wired in this circuit, and I have mistakenly generated this code before by trying to start the car with the switch in the wrong (off) position. I did make this mistake on my previous drive, so that's probably where the code came from.

I removed my switch from the circuit and also swapped a known-to-be-working sensor over from the ForkenSwift. No go. The car runs the same.

I reset the error code and it hasn't come back. No other codes are coming up, and the CEL is off, which is really surprising considering how crappy the car is running.

Spark plugs are black as night, covered with soot.

Battery voltage is fine (I re-connected the alternator).

Any suggestions where I should look next?