A Series Diesel Engine Troubleshooting Logic 19
Surging (Speed Change)
Cause
Correction
If the Condition Occurs at Idle, the
Idle Speed is Set Too Low for
Accessories
Adjust the Idle. Refer to Page 73
OK
High Pressure Fuel Leak
Inspect/Correct Leaks in the Pressure
Lines. Fittings, Injector Sealing Washers
or Delivery valves. Refer to Page 78
OK
One or More Injectors Worn or
Malfunctioning
Check/Replace the Injectors.
Refer to Page 88
OK
Malfunctioning Delivery Valve
Replace Delivery Valves.
Refer to Page 84
OK
Malfunctioning Injection Pump
Replace the Pump.
Refer to Page 94
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