1999 Subaru Legacy spitting and sputtering

The car has been on its way out since I bought it with one problem right after another. But recently after a good sized storm here in New England. About 2 feet and 40 mile an hour winds. It started spitting and sputtering on acceleration. Once it reaches about 2 and 3/4 to 3000 rpm it comes out of it. The exhaust is broken right behind the cat, but has been for a while. So I figured snow in the engine, there was a little but not much to speak of. Oil and other fluids are fine. Just trying to get by for a couple months until I can find something else. Is there anything else anyone can think of without spending a fortune