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Diesel Engine Troubleshooting Symptoms
27
Engine Runs Rough or Misfires
This is symptom tree T-007.
Cause Correction
Fuel level low in the tank
Fill the supply tank.
OK
Clogged fuel tank air breather hole
Clean the fuel tank breather.
OK
Low idle speed is adjusted too low
Adjust the low idle speed.
OK
Clogged prefilter
Clean the prefilter.
OK
Clogged fuel filter or strainer
Clean or replace the fuel filter or strainer.
OK
Line between the fuel tank and feed pump
are clogged or have air in them
Clean and repair the lines.
OK
Line between the feed pump and the injector
nozzle are clogged or have air in them
Clean and repair the lines.
OK
Injection pump is malfunctioning
Replace the injection pump.