About two weeks ago, the car ran great no problems, went to start it up
nothing but heard noise from starter. Removed it, gear bad in it, installed new one but still will not start. Battery is about six months old, plenty fuel in tank changed out glow plugs, nothing. With a meter tested the timer relay, wires to glow plugs seems all right. Changed fuel filters. I am new to diesel engines
so any help would be appricated.

Thanks