Vehicles using 6G73 engine list:

Engine 6G73

Symptoms:
- Rough idling or stalling
- Loss of power or poor acceleration
- Engine overheating
- Unusual noises from the engine bay
- Check engine light illumination

Diagnosis:
- Inspect spark plugs and ignition coils for wear or damage
- Check for vacuum leaks in hoses and intake manifold
- Test coolant system for leaks or blockages causing overheating
- Perform compression test to assess cylinder health
- Scan engine control unit (ECU) for stored fault codes

Fixes:
- Replace worn or fouled spark plugs and faulty ignition coils
- Repair or replace cracked vacuum hoses and intake gaskets
- Flush and refill coolant; repair leaks in radiator, hoses, or water pump
- Replace faulty thermostat if overheating persists
- Address any mechanical issues found during compression test, such as valve or piston ring wear
- Clean or replace the mass airflow sensor and throttle body if dirty

Prevention:
- Regularly change engine oil and use recommended grade to maintain lubrication
- Replace spark plugs and ignition components at manufacturer intervals
- Maintain cooling system by flushing coolant and inspecting hoses periodically
- Use quality fuel to prevent carbon buildup
- Keep air filter clean to ensure proper air intake and engine performance
- Address minor issues promptly to avoid escalation into major repairs

The 6G73 engine in the Mitsubishi Galant 2.5i V6-24V (1992–1996) is generally reliable but benefits greatly from routine maintenance and timely repairs to prevent common issues such as ignition faults and cooling system failures.