Engine Runs Rough Or Misfiring - Dodge D250 1990 Service Manual

Troubleshooting Logic
Page9A-12
Base Engine Components
DODGETurbo Diesei
Engine Runs Rough Or Misfiring
Cause
Correction
Fuel Injection Lines Leaking
Inspect/Correct Leaks in the High
Pressure Lines, Fittings, Injector
Sealing Washers, or Delivery Valves.
Inspect/Correct Leaks in the High
Pressure Lines, Fittings, Injector
Sealing Washers, or Delivery Valves.
OK
Air in the Fuel or the Fuel Supply is
Check the Flow Through the Filter and
Bleed the System. Locate and Correct
the Air Source.
inadequate
Check the Flow Through the Filter and
Bleed the System. Locate and Correct
the Air Source.
OK
Contaminated Fuel/Fuel Contaminated
Verify by Operating the Engine with
Clean Fuel from a Temporary Supply
with Gasoline Tank. Check for Presence of Gasoline.
Replace Fuel/Water Separator Filter.
OK
t
Incorrect Valve Adjustment Check for a Bent Push Rod and Adjust
Valves.
OK
t
Injection Pump Timing Incorrect Check/Time Pump.
OK
*
Malfunctioning Injectors
Check and Replace Injectors.
OK
t
Defective injection Pump (Delivery Replace Injection Pump.
Valves)
OK
*f Continued