ultimate tuning logo

EGR Delete Solutions: Improve Performance & Efficiency

Almost all modern vehicles utilise an Exhaust Gas Recirculation (EGR) system to reduce harmful nitrogen oxide (NOx) emissions. It works by looping a controlled amount of exhaust gas back into the engine's intake system. While beneficial for the environment, EGR systems can sometimes lead to severe performance drawbacks, fuel usage increases and potential clogging issues. This is where we come in.

Understanding EGR Deletes: Performance Gains, Fuel Economy & Legal Considerations

Important Note: Modifying your vehicle can impact legality depending on your location. Always check local laws and regulations before making changes. This article provides information only and shouldn't be taken as advice to make illegal modifications. In most areas, EGR deletes are strictly for off-road use only.

Exhaust Gas Recirculation (EGR) is a technology primarily used in diesel engines to reduce nitrogen oxide (NOx) emissions by looping exhaust gases back into the engine.
Diesel engines are workhorses, but sometimes environmental regulations can hold them back. While initially good for the environment, many diesel owners have found EGR deletes can remedy severe drivability issues arising from faulty EGR systems and unlock hidden performance.
Let’s explore the potential benefits and crucial considerations before making a decision.

Boosting Performance:

  • Improved Engine Efficiency: The EGR system reduces oxygen intake, leading to a richer air-fuel mixture and potentially incomplete combustion. Removing the EGR allows more oxygen in, promoting efficient burning and better performance.
  • Reduced Carbon Buildup: Over time, the EGR can cause carbon deposits to clog the intake system and valves, severely hindering airflow and performance. An EGR delete can remedy this situation and eliminate EGR related issues, leading to a smoother-running engine.
  • Lowered Engine Temperatures: The EGR introduces hot exhaust into the engine, raising temperatures. Removing it can help maintain optimal temperatures and reduce the load on the cooling system, benefiting performance and engine longevity.
  • Increased Turbo Lifespan: In turbocharged diesels, the EGR can introduce carbon and contaminants that harm the turbo. An EGR delete can help extend the turbo’s lifespan.
  • Enhanced Fuel Economy: Some users report improved fuel economy after an EGR delete. This is due to the engine running more efficiently without the recirculated exhaust.

Important Considerations:

  • Environmental Impact: The EGR’s primary purpose is to reduce NOx emissions. Deleting it increases these pollutants, potentially harming the environment. We advise against EGR deletes for non-off-road vehicles.
  • Legality: Many regions have strict laws against tampering with emission control systems like EGR. EGR deletes are only recommended for dedicated off-road vehicles that never operate on public roads. Check your local regulations before proceeding.
  • Potential Engine Damage: Improper EGR deletes can damage the engine or other components. Always consult experienced professionals for any modifications.

The Bottom Line:

Diesel EGR deletes offer proven performance gains and fuel savings, but there are environmental impact and legal issues that go with it. Before modifying your vehicle, carefully consider these factors, consult with professionals, and ensure compliance with local laws. Remember, a clean environment and a healthy engine go hand-in-hand!



EGR Intake Cleaning

For those looking to improve performance and restore fuel efficiency without the legal or environmental concerns, Ultimate Tuning offers a professional grade EGR intake cleaning service. Want to find out more about what we do and how it works? Hit the button below!

Please read carefully before using our services

At Ultimate Tuning, we strive to provide accurate and reliable information about the potential gains that can be achieved through our services. However, it’s important to note that the quoted gains may vary depending on various factors, including the specific vehicle, its condition, and any existing modifications.


The advertised power and torque increases are estimated figures based on our experience and the results obtained from previous remapping projects both on dyno and data-based. Actual gains may differ from the quoted figures.


We also emphasize that while our remapping services are designed to enhance performance, fuel efficiency, and overall driving experience, the results can be subjective and may vary based on individual driving styles and conditions. It is crucial to understand that the extent of the performance gains may not be identical for every vehicle.


The process of remapping involves the modification of ECU data, which inherently entails the potential risk of failure or damage to the ECU and its associated components. In certain cases, the remapping procedure may necessitate the removal, opening, and modification of the vehicle’s ECU. By engaging in the remapping service, the Customer expressly acknowledges and assumes all risks associated with such activities. Furthermore, the Customer releases Ultimate Tuning from any liability or responsibility arising from or in connection with the remapping process.


It is essential to consider that any modifications made to the vehicle’s ECU may affect its warranty or insurance coverage. We recommend consulting with your vehicle manufacturer, dealer, or insurance provider to understand the potential implications before proceeding with our remapping services.


We strive to provide the highest quality remapping services and ensure customer satisfaction. However, we cannot guarantee specific results or performance gains. We encourage all customers to discuss their requirements, expectations, and any concerns with our team to make informed decisions about our remapping services.


Please feel free to reach out to us for further clarification or to address any specific questions or concerns you may have.

Upper Hutt, Wellington

© 2024 Ultimate Tuning NZ

Keen to book a remap?

Have a friendly yarn with us today about how we can achieve your goals!

Upper Hutt, Wellington

© 2024 Ultimate Tuning NZ