Hello, I'm back again. My 93 w250 360 misfires as soon as it starts and I checked for codes and there is none. Before this happened it had a intermittent misfire problem. It would run perfect and all of a sudden it would start misfiring and stall. But now it misfires from start up and it's not throwing any codes. Any help will be appreciated. Thanks!

 

When was the last tune up done(cap/rotor,plugs,wires)? Might want to put put a gauge on the the fuel rail to see what the fuel pressure is also.