Mitsubishi D04FR-TAA Troubleshooting
| Engine Model: Mitsubishi D04FR-TAA |
| Engine Type: 4-cycle inline 4-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 259.3 cu.in (4.25 L) |
| Rated Engine Power: 99 Hp (74 kW) at 2000 rpm |
| Fuel System Type: Common rail fuel injection |
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| Engine starts hard or doesn't start |
Fuel filter plugged - Clean the filter element.
Air in the fuel lines - Bleed the fuel lines.
Clogged or defective injection nozzles - Install a new kit of correctly balanced nozzles.
Fuel injection pump is not working correctly - Install a new pump or rebuild.
Valve timing is incorrect - Set the valve timing correctly.
Plugged fuel pipes - Clean or replace fuel pipes.
Injection timing is incorrect - Adjust according to specifications.
Damaged piston rings and cylinder - Replace defective components.
| Diesel starts but immediately stops |
Fuel filter element is dirty - Replace the filter element.
Fuel injection pump failure - Repair or change injection pump.
Plugged air cleaner - Install new air filter element.
Improper nozzle opening pressure - Set up as recommended.
| Engine stops running suddenly |
Fuel injection timing is wrong - Set the fuel pump timing correctly.
Fuel filter plugged - Clean the filter element.
Low coolant temperature - Warm up to required temperature.
Defective or stuck injection nozzles - Repair or change injection nozzles.
Too low idle RPM - Test and adjust.
Improper valve clearance - Adjust valve clearance.
Fuel injection pump is broken - Rebuild or install a new injection pump.
Fuel injection nozzles are damaged - If necessary, replace with a new nozzle.
Fuel lines or hoses are clogged - Clean fuel system hoses and lines.
Clogged air cleaner - Service air cleaner.
Damaged cylinder-head gasket - Install new cylinder head gasket.
Injection timing is incorrect - Check injection timing adjustment.
Fuel injection pump is damaged - Change or repair the pump.
Any of moving engine parts is worn - Change or repair damaged parts.
Radiator core is clogged or radiator cap is leaking - Clean radiator or replace cap.
Coolant level is low - Top up coolant fluid and check system for leaks.
Loose or damaged fan belt - Replace the fan belt.
Engine oil insufficient - Need to add engine oil.
Cylinder head gasket is blown - Replace the gasket as required.
Improper injection timing - Use correct injection timing adjustment.
| Oil pressure is insufficient |
Low oil level - Add oil to the engine crankcase.
Oil pump is defective - Replace as required.
Plugged engine oil filter - Service or change engine oil filter element.
Relief valve is seized or worn - Change or service relief valve.
Crankshaft bearing clearance is excessive - Inspect and replace or repair faulty parts.
Clearance of crankpin bearing is excessive - Inspect and replace or repair faulty components.
| Diesel engine consuming too much oil |
Oil leakage: Seals or gaskets are defective - Change worn parts according to specifications.
Wrong oil viscosity - Use oil of correct viscosity.
Worn or stuck piston rings - Change the piston rings as required.
Damaged valve guides or valve stems - Replace the valves.
Cylinder liners or pistons are damaged - Inspect liners and pistons, change as necessary.
| Abnormal engine knocking or noise |
Coolant temperature is low - Warm up engine as required.
Low engine oil level - Check and refill engine oil.
Wrong setting of fuel injection pump timing - Adjust the pump as required.
Pistons are scored or worn - Pistons replacement required.
Connecting rod misalignment or failure - Replace or align connecting rod.
| Starter motor cranks slow |
Low battery output - Low battery charging, charge as required.
Battery discharges quickly - Service or change the battery.
Terminals are faulty or battery cables are disconnected - Connect cables correctly or replace terminals.
Battery is drained or defective - Need to charge or replace the battery.
Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required.
Low battery voltage - Charge the battery.
Starter motor is damaged - Starter should be replaced.
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