Rodbolt or ? engines have approx 480 hours. starboard engine idles rough and will die and will not accelerate. port engine runs perfect. have checked, cleaned or swapped port to starboard the following parts: o2 sensors, vst with new filters, cdi unit, stater assemblies, plugs. fuel pressure looks good - constant 35psi with gauge attached. checked all 3 lift pumps and diapragms look good. loosened and cleaned all ground connections found. also checked main harness connection. racor water separator filters replaced. disconnected fuel rail and observed all 6 injectors while cranking. all 6 operating. should injector create a stream or cone type pattern? if i shoot starting fluid into the intake ports, it fires up strong. could it be quenching the spark with injector pulse too wide? don