Well if you spray ether the machine start good, but it seems like there are bad injector creating slight black smoke and vibration. Anyway, I opened the main pressure line between the fuel pump and the rail from the rail side (this is really dangerous) and try to start the engine, there was a little fuel spirting about one inch out from the line. Is that normal? I tested the feed pump line between filter and main pump and found enough fuel flowing to the pump. Could it be the pump that is worn too