Well, when I pulled the plug to look at it I cracked it. I went to the store yesterday and bought a replacement. When I opened the hood to install it I noticed the coolant was gone. All of it. It all leaked out. Can't find anything obvious inside the engine compartment or on the ground, and it isn't in the oil thankfully.
I haven't given up, was just in a bad mood when I posted that. One of my friends is being rather pessimistic and unhelpful about this situation. Best case is the coolant is unrelated and there is some not terribly serious issue with the fuel or spark. I am kind of worried it is a head, head gasket, or an intake manifold problem (these engines are supposed to be pretty bulletproof...except for the intake manifold), though.
it should warm up today, a little, so I am going to check for spark. I bought one of those spark checkers that you install between the plug and the wire. Gunna be warm but rainy until sunday
I am also [censored] I paid a stupid amount for the shop to basically replace the plugs and wires to fix this 2 months ago. When its pretty obvious now they only treated the symptom and not the root cause.
PS. I checked the gap on the plug, it was fine.
PPS. I appreciate any help you guys can give, this is stressing me out