Mitsubishi 4G94 2.0 engine

The Mitsubishi 4G94 engine, with a displacement of 2.0 liters, was produced from 2000 to 2010 at the Kyoto plant. This inline four-cylinder engine with an injector power system was installed in various Mitsubishi car models, including the Lancer, Lancer Classic, Galant, Dion and Pajero iO.

Technical specifications

Performance characteristics

Fuel consumption

The Mitsubishi 4G94 engine exhibits moderate fuel consumption figures that vary depending on operating conditions:

• City cycle: 11.0 l/100 km
• Suburban cycle: 7.4 l/100 km
• Mixed cycle: 9.6 l/100 km

Oil consumption

Average oil consumption is up to 1000 g/1000 km, which is normal for engines of this class. It is recommended to use engine oils with the parameters specified by the manufacturer to ensure optimal engine performance.

Maintenance and service life

To maintain optimum engine performance, it is recommended to change the oil every 5000 km, despite the fact that the manufacturer specifies an interval of 10000 km. The volume of oil in the engine is 3.8 liters.

The average life of the 4G94 engine is 200-250 thousand kilometers, and it is important to follow the regularity of maintenance and use quality consumables.

Potential tuning

4G94 engine has the potential for tuning, which allows to increase power up to 200+ hp. However, when performing such modifications, it is important to consider the balance between performance and durability to avoid a significant reduction in engine life.

Application

The Mitsubishi 4G94 engine has been installed in the following vehicle models:

Modifications of the power unit

4G94 has a number of modifications, which differ in parameters and a number of nuances:

1. 4G94 SOHC. Version with a single camshaft (SOHC). It has 16 valves (4 valves per cylinder) and provides reliable operation with sufficient power.
2. 4G94 DOHC. The engine is equipped with 2 camshafts (DOHC). Also has 16 valves, which provides better performance and responsiveness.
3. 4G94 MIVEC. A motor with a variable valve timing system that optimizes power and economy. The 4G94 modification has more efficient timing and additional valve adjustment options.
4. 4G94 Turbo. Turbocharged version. The presence of a turbine increases power and torque, resulting in more dynamic performance.

The 4G93 is referred to as one of its predecessors. This powertrain was produced in modifications, which were considered above.

Variants of tuning the 4G94 engine

Works to increase power are available to owners:

• Electronic control firmware to optimize engine performance. Includes increasing power, torque and optimizing fuel consumption.
• Installation of a high-performance air filter. Optimizes airflow and improves performance.
• Replacing the standard exhaust system with a more free-breathing exhaust system, such as a sport muffler and exhaust manifold.
• Turbo installation. Significantly increases engine power and torque.
• Reinforced cooling system: larger radiator or electric fan. Helps maintain optimum engine temperature under heavy load conditions.
• Modification of engine components such as pistons or cylinder heads to increase compression.

One common option is to provide MIVEC. This is accomplished by installing the appropriate cylinder head, timing belt, injectors from the Lancer GSR, and ECU from the 4G92. As a result, the power increases to 190 “horses”.

To increase the “horses” it is recommended to port the head, combine the channels, install wide shafts, 63-millimeter choke, cold intake and Skunk2 receiver. After customization, it is possible to achieve 200 “horses”

The second option is to install a turbine on the 4G94. Brief algorithm:

1. Preparing a ready-made Turbo Kit, for example, from 4G93T.
2. Installation of oil injectors.
3. Refurbishing the CVT with a lower compression ratio.
4. Installing Kit with intercooler.
5. Replacing the injectors with 390 cc.
6. Installation of a 63mm exhaust system and tuning to 0.8-1 bar.

Motor maintenance schedule

To achieve a resource of 300 thousand kilometers, it is important to timely service the 4G94 engine and change various components.

Basic recommendations:

• change of oil and filter – 5-10 thousand km;
• installation of a new air filter – 15-20 thousand km;
• replacement of spark plugs – 30-50 thousand km;
• drive timing – 90 thousand km;
• fuel filter – 20-40 thousand km

Periodically it is worth checking the injection and exhaust system, monitor the operation of the ECU and ignition system. The recommended oil for filling is 5W-30, and the optimal volume is 3.8 liters.

Possible breakdowns and problems of the internal combustion engine 4G94

The 4G94 engine is considered one of the most reliable, but it still has weak points:

1. DPRV sensor error. Requires testing the wiring and measuring the quality of the power supply. If a breakdown is detected, the node must be replaced. If nothing is done, there are failures in the work of the injectors. The engine can not be started.
2. Knocking. A characteristic problem for 4G94. The cause is hydraulic compensators. To solve the issue requires replacement and the use of quality grease.
3. Flooding of plugs in cold weather. For protection, it is recommended to use high quality oil. This also applies to gasoline.
4. Swimming revolutions. It is characteristic of 4G94 with GDI. The cause of the problem is the TNVD. The solution requires cleaning the filter, which is located on the side, as well as inspection and cleaning of the throttle valve.
5. Hot Start Difficulty. The cause is most often the RCH, which requires replacement.
6. Oil burning at high mileage and the appearance of soot. If there are difficulties with de-scaling, it is necessary to change the rings and caps.
7. Rotation of liners. Occurs when oil pressure drops, so it is important to monitor the parameter.