Dodge RAM 1500 1998 Owner's Manual page 1460

DR
ENGINE 5.9L DIESEL (Continued)
POSSIBLE CAUSE
Air in fuel supply: Possible leak in fuel supply side (between
transfer pump and fuel tank module).
Coolant leaking into combustion chamber.
Diagnostic Trouble Codes (DTC's) active or multiple,
intermittent DTC's.
In very cold ambient temperatures, engine block heater is
malfunctioning (if equipped).
Engine coolant temperature sensor malfunctioning.
Engine Control Module (ECM) not calibrated or has incorrect
calibration.
Fuel filter plugged.
Fuel grade not correct or fuel quality is poor.
Fuel heater element or fuel heater temperature sensor
malfunctioning. This will cause wax type build-up in fuel filter.
Fuel injector malfunctioning.
Fuel injector hold-downs loose.
Fuel injector protrusion not correct.
Fuel injection pump malfunctioning.
Fuel supply side restriction to transfer pump.
Fuel transfer (lift) pump malfunctioning.
Intake/Exhaust valve adjustments not correct (too tight).
Intake manifold air temperature sensor malfunctioning.
Intake manifold heater circuit not functioning correctly in cold
weather.
Intake manifold heater elements not functioning correctly in
cold weather.
Internal engine damage (scuffed cylinder).
Restriction in fuel supply side of fuel system.
EXCESSIVE WHITE SMOKE
(Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/FUEL
TRANSFER PUMP - DIAGNOSIS AND TESTING).
Do pressure test of cooling system (Refer to 7 - COOLING -
DIAGNOSIS AND TESTING).
Refer to Powertrain Diagnostic Procedures Information.
(Refer to 7 - COOLING/ENGINE/ENGINE BLOCK HEATER -
REMOVAL).
A DTC should have been set. Refer to Powertrain Diagnostic
Procedures Information. Also check thermostat operation
(Refer to 7 - COOLING/ENGINE/ENGINE COOLANT
THERMOSTAT - DIAGNOSIS AND TESTING).
A DTC should have been set. Refer to Powertrain Diagnostic
Procedures Information.
Refer to Powertrain Diagnostic Manual for fuel system testing.
Temporarily change fuel brands and note condition. Change
brand if necessary.
Refer to Fuel Heater Testing (Refer to 14 - FUEL SYSTEM/
FUEL DELIVERY/FUEL HEATER - DIAGNOSIS AND
TESTING).
A DTC should have been set. Perform Cylinder cutout Test
using DRB scan tool to isolate individual cylinders. Also refer
to Powertrain Diagnostic Procedures Information and, (Refer
to 14 - FUEL SYSTEM/FUEL INJECTION/FUEL INJECTOR -
DIAGNOSIS AND TESTING).
Torque to specifications.
Check washer (shim) at bottom of fuel injector for correct
thickness. (Refer to 14 - FUEL SYSTEM/FUEL INJECTION/
FUEL INJECTOR - INSTALLATION)
A DTC should have been set. Refer to Powertrain Diagnostic
Procedures Information.
Refer to Powertrain Diagnostic Manual for fuel system testing.
A DTC may have been set. Refer to Powertrain Diagnostic
Procedures Information.
(Refer to 9 - ENGINE/CYLINDER HEAD/INTAKE/EXHAUST
VALVES & SEATS - STANDARD PROCEDURE).
A DTC should have been set. Refer to Powertrain Diagnostic
Procedures Information.
A DTC should have been set. Refer to Powertrain Diagnostic
Procedures Information. Also check heater elements for
correct operation.
A DTC should have been set if heater elements are
malfunctioning. Refer to Powertrain Diagnostic Procedures
Information.
Analyze engine oil and inspect oil filter to locate area of
probable damage.
Refer to Powertrain Diagnostic Manual for fuel system testing.
ENGINE 5.9L DIESEL
CORRECTION
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