Cylinder do not fire :
1.The shut off valve on the fuel supply pipes or before the fuel filters are closed .
2.Insufficient fuel supply pressure .
3.Fuel is either unsuitable or contains water.
4.The fuel pump chamber or delivery pipe have been only insufficiently primed or not at all , and contain air or fuel vapour .
5.Compression pressure is too low .
6. The quantity of injected fuel is insufficient .The speed adjusting lever should be moved to a some what higher position .
7.The regulating linkage or one or more eccentric shaft stuck .The load indicator should be checked .
8.The governor moving arms sticks in an extremely low position and releases only an insufficient fuel charge or none at all .
9.One of the control element is stuck ,the cut out servomotor does not release a fuel charge .
10.The fuel pump plungers are either raised or seized.
11.The fuel pump valves are either leaking or stuck .
12.The safety governor has tripped and fuel pump suction valve remains constantly open .
13.The fuel valve nozzle are either obstructed or defective or thheir needles are stuck.
14.The priming pump of the fuel valve open or leaking .
15.Lube oil pressure or cooling water pressure is too low .the automatic cut out device does not release fuel supply .