problem...?
 

gas smell and smoke from exhaust

Uhhhh, I'd say yes.;)

Re: problem...?
 

Sounds like your running really rich. Is your exhaust really black?

Are your catalytic converters shot?

Have you run any diagnostics yet?

i dont know. i havent checked on anything yet. if im running rich and exhaust is black, what can i do...?

Well, I'd check to see if any of the cylinders wasn't firing, leaving a bunch of unburnt fuel mix to burn up in the cats, thus the gas smell/black smoke.

You should probably go to a good Z mechanic and have them go through a complete mechanical check up for what needs to be done now, what should be done soon, and what could be done for preventative maintenance.

Good luck.