Engine Maintenance (Rev. 04/03)
50
Timing Individual Cylinder Injection
This procedure should be used when a poor running engine
has had all possible problems checked but continues to run
badly. If the injection pump has been repaired or replaced,
the chance of individual cylinder timing problems has a
greater possibility of occurring.
To check individual cylinder timing, follow the pump tim-
ing procedure but instead of changing shims to adjust pump
timing, check the timing of number 2 and number 3 injector
to the engine after checking number 1. The cylinders should
time on their respective flywheel timing marks.
If the injection pump plungers are not correctly timed to
each other, the pump must be removed and sent to a diesel
injection equipment repair shop for calibration.
NOTE: The order of the flywheel timing marks is 1, 2, 3,
but the firing order is 1, 3, 2. This is because the engine
fires every 240
o
of crankshaft rotation. Therefore, when
checking individual cylinder timing check number 1 first
Timing Marks
then rotate the engine past number 2 to number 3 and
check number 3. Then rotate the engine past number 1 to
number 2 and check number 2.
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