Blacktie

well went to go check out my car today and when i finally got it started (dead battery)
there was some brownish black liquid coming out of the exhaust accompanied with smoke

and my motor was putting like it was about to die

it was doing this the first couple of times i started it and drove it

then it went away(cept the smoke)

any ideas what this might be??

its a 91 integra rs stock B18a