The codes that I've been getting all along are missfire codes.. P0301, 0303, 0305 ... before I replaced the Fuel Pressure Regulator I was getting the missfire because of a rich condition.. as the plugs were completely black/carbon fouled. After replacing the regulator the plugs cleaned right up and now have no residue at all on them.. completely clean. I swapped the old out with new plugs again tonight and these while still flashing the missfire are completely clean. From reading about aftermarket headers and what not the MIL eliminator seems to be the cure for the lean condition when running either headers or stock with gutted pre-cats as well as mains.
