CUMMINS B3.3 - Engine Runs Rough or Misfires

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.