HELP! Slant 6 just doesn't want to go!

Sometimes it restarts sometimes it doesn't, when it does it might be for 30 seconds or so. You're right about the exhaust and I forgot to mention that. Something did burrow in the pipe so it was removed from the muffler back (the muffler was packed). When the car was running for it's two minutes there was nothing else coming out the exhaust, and it seemed pretty clear.