bought a 92 burban with a 350 with 195,000 miles on the body and about 20,000 on the newer motor. it sat for about 8 months to a yr. before i got the chance to start it up. checked the tranny flu. and oil flu. tranny flu was alittle low, so i added some qt's. the oil looked ok. also the gas was very low,so i also added some [1/2 tank]. while out driving sat. after noon after checking everthing and letting it run alittle,it started to idle rought and while driving it started to run rough. like it wanted to shut down. anyone have any idea's? after getting back home i checked somethings, everything checked out good,but the air filter was nasty[needs to e changed]. i'm thinking it could be fuel pump,fuel filter,air filter,sencer of some type. thank you for anyone willing to help.