Wife brought the disco home and said that there was a vibration. sitting idleing . Seams like it,s running on 4 cylinders. Injector loom new and ok ran Navco and no faults and injector ballance acceptable. all injectors pass test .Took to indi and put on test book still no problem. No fuel in sump and no excess smoke no loss of water Help I,ve run out of ideas!!!!!!!