Well, our truck is going to get (mostly) fixed. That's the good news.
The problem is lots of things were wrong with it: the exhaust manifold, the spark plugs (which I had suspected but second-guessed myself), the catalytic converter, AND the fuel pump (stupid ethanol).
We simply cannot afford to replace the cat, so that's not getting done right now. To get all the other stuff done, it's going to cost about 800 dollars. We have no choice but to put it on the credit card, which already has a bunch of stuff on it for reasons I'm not going to go into now.
I guess what I'm asking is...pray that God will provide me with a job, or a winning lottery ticket, or SOMETHING. :\