Problems starting 1990 240SX

[dmaestro]

Ok, I have a 1990 240SX w/the stock engine w/200k miles. It has some serious problems starting, and it's pretty intermittent. It cranks and but doesn't fire. I'd suspect it to be the starter but when it doesn't start it just cranks and smells like raw fuel, like it keeps flooding/getting way too much fuel (mind you i don't even tap the peddle at all while starting). And when it does start, there isn't much power, it shoots black smoke from the exhaust, and the exhaust shakes madly w/each rev.

My best guess is the cat is clogged, but that is just a guess. Any ideas?

thanks