[JL8Jeff]

I keep forgetting the 94-95 cars are in a world of their own. My 96 SS kept popping up a P0300 random multiple misfire but it actually ran fine and never really had a miss. Have you tried looking at the engine in the dark to see if you can see any spark jumping somewhere? It really is an easy test to look for a misfire and I've found problems using this method. You might also have small vacuum leak at idle that would make it rough. Check all the rubber intake parts closely and vacuum lines.