Infiniti G35 Performance Problems: Common Issues After Mods and How to Solve Them

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The Infiniti G35 is a beloved sports sedan known for its performance and luxury. However, after modifications, owners may encounter various performance issues. Understanding these problems and their solutions is essential for maintaining the car’s performance.

Common Performance Problems After Modifications

  • Engine Misfire
  • Increased Fuel Consumption
  • Overheating Issues
  • Loss of Power
  • Check Engine Light Activation

Engine Misfire

One of the most common issues after modifications is engine misfire. This can be caused by changes to the ignition system or fuel delivery.

Causes

  • Improperly gapped spark plugs
  • Faulty ignition coils
  • Inadequate fuel pressure

Solutions

  • Check and adjust spark plug gaps.
  • Replace faulty ignition coils.
  • Inspect fuel pump and filter for blockages.

Increased Fuel Consumption

Modifications can lead to increased fuel consumption, which is not only costly but also indicates potential performance issues.

Causes

  • Improper tuning after modifications
  • Upgrades that require more fuel
  • Air intake issues

Solutions

  • Re-tune the ECU for optimal performance.
  • Ensure air filters are clean and functioning.
  • Consider upgrading to high-performance injectors.

Overheating Issues

Overheating can be a serious issue, especially after performance modifications that increase engine output.

Causes

  • Insufficient cooling system upgrades
  • Faulty thermostat
  • Low coolant levels

Solutions

  • Upgrade to a high-performance radiator.
  • Replace the thermostat if faulty.
  • Regularly check and maintain coolant levels.

Loss of Power

A noticeable loss of power can occur after modifications, which can be frustrating for performance enthusiasts.

Causes

  • Poor tuning
  • Exhaust restrictions
  • Faulty sensors

Solutions

  • Re-tune the engine management system.
  • Inspect the exhaust system for blockages.
  • Check and replace faulty sensors.

Check Engine Light Activation

The check engine light can activate for various reasons after modifications, indicating underlying problems that need attention.

Causes

  • Improperly installed aftermarket parts
  • Faulty O2 sensors
  • ECU errors

Solutions

  • Ensure all modifications are correctly installed.
  • Test and replace faulty O2 sensors.
  • Use an OBD-II scanner to diagnose ECU errors.

Conclusion

Modifying an Infiniti G35 can enhance performance, but it can also lead to various issues. By understanding these common problems and their solutions, owners can ensure their vehicles remain in peak condition.