Ever since I started mucking around with my exhaust manifold, an odd starting issue has popped up.

Once in a while I will get a hard start, itll whirl n whirl n whirl, let off, try again, itll kick and start, try and idle at around 400 rpm. Give it a little gas and itll start spitting and sputtering at 1200rpm and doesnt come out of it, but if I shut it off and restart, the problem is solved. Recent tune up, fuel filter and such.

Any suggestions?

Your average high mileage '95 Kee, 4.0L AW4.