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EGR Delete Explained (Pros & Cons)

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EGR Delete Explained (Pros & Cons)

An EGR delete is a modification that removes the exhaust gas recirculation system from a vehicle. This can be done for a number of reasons, such as increasing performance or preventing engine damage. To complete the process, you’ll need an aftermarket performance kit that physically removes the EGR valve, preventing exhaust from reentering the engine.

A vehicle’s EGR system forces a small amount of exhaust gas back into the intake to help reduce carbon emissions. By removing the system, though, drivers can improve their engine’s power output by as much as 2%. Additionally, EGR deletes can improve fuel economy by up to 2% and prevent engine damage caused by the build-up of soot and other particles.

If you’re curious about how an EGR delete could improve your vehicle’s performance, continue reading to learn more. In this guide, we’ll explain what the exhaust gas recirculation system does, how removing it can benefit your engine, and guide you through the system of installing an aftermarket EGR delete kit.

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What is the EGR System and How Does it Work?

The exhaust gas recirculation system, or EGR system, is a vehicle emission control device that helps reduce the number of pollutants emitted by an engine. The system does this by recirculating a small amount of exhaust gas back into the engine’s intake, where it’s then burned along with the air-fuel mixture.

The EGR system was first introduced in the 1970s as a way to meet stricter emissions standards set by the US government. The system became mandatory in all vehicles sold in the United States by the 1980s.

While the EGR system was designed to reduce emissions, it can also have a negative effect on an engine’s performance. This is because the exhaust gas that’s recirculated back into the engine can contain soot and other particles that can build up on the valves and pistons, causing engine damage.

Additionally, the EGR system can cause an engine to run hotter because the recirculated exhaust gas increases the temperature of the air-fuel mixture. This can lead to pre-ignition, which can cause engine damage. For these reasons, many drivers choose to remove the EGR system from their vehicle with an EGR delete.

Is it Legal to Remove the EGR System?

The answer is a bit complicated in the United States. The Environmental Protection Agency (EPA) has strict emissions standards that all vehicles must meet in order to be sold. These standards are known as the Clean Air Act, and they’re enforced by the federal government. The Clean Air Act does not specifically mention the EGR system, but it does require all vehicles to meet certain emissions standards.

This means that, technically, removing the EGR system from a vehicle could be considered illegal. However, the EPA does offer a “performance kit” exemption that allows drivers to modify their vehicle as long as the modifications do not increase emissions. This means that, as long as an EGR delete kit does not increase emissions, it would be considered legal under the Clean Air Act.

Of course, it’s important to note that each state has its own emissions standards, so it’s always best to check with your local legislation before performing any modifications to your vehicle.

How Does an EGR Delete Kit Improve Engine Performance?

Most drivers using an aftermarket EGR delete performance kit do so to improve their engine’s power output and prevent harmful carbon deposits. By removing the system, drivers can improve their engine’s performance in the following ways:

Prevent Carbon from Reentering Valves and Pistons:

Carbon is a natural byproduct of internal combustion but, over time, it can leave deposits of hardened black soot throughout an engine. This build-up can lead to rough idling, poor acceleration, and cylinder misfires. By removing the EGR, though, carbon-rich exhaust cannot reenter the intake valve.

Up to 20% Better Fuel Economy:

The EGR system recirculates a small amount of exhaust gas back into the engine’s intake. This exhaust gas contains carbon dioxide, which can reduce the air-fuel mixture’s overall octane levels. This, in turn, can lead to higher fuel consumption. By removing the EGR system, though, drivers can improve their fuel economy by up to 20%.

Increased Horsepower and Torque:

One of the main reasons drivers choose to delete their EGR system is for performance gains. By preventing exhaust gas from reentering the intake, the engine can breathe easier, leading to increased power output. Most drivers see an increase of 2% in both horsepower and torque after completing the modification.

Cooler Engine Temperatures:

The EGR system recirculates exhaust gas back into the engine, which can lead to increased engine temperatures. This can be especially problematic in hot weather or during stop-and-go traffic. By removing the EGR system, though, drivers can help keep their engine cooler, preventing pre-ignition and engine damage.

Are There Any Disadvantages to an EGR Delete?

While there are a number of advantages to an EGR delete, there are also a few potential disadvantages:

Warranty Issues:

Removing the EGR system could void your vehicle’s warranty. Most car manufacturers will not honor a warranty if you’ve intentionally removed an integral part of the exhaust system. However, you can purchase an aftermarket warranty to cover your engine if it’s damaged.

Increased Emissions:

By removing the EGR system, you could increase your vehicle’s emissions. If you’re pulled over by the police and they discover that you’re driving a vehicle that fails to meet EPA standards, you may face a fine. However, you can purchase an install an aftermarket catalytic converter to reduce emissions.

Louder Engine Performance:

Removing the EGR could cause your engine to run louder. If this bothers you or your neighbors, you can purchase an aftermarket muffler to help reduce the engine noise.

If you’re committed to removing your vehicle’s EGR system, we recommend investing in a few additional aftermarket parts to balance out some of these disadvantages.

How to Install an EGR Delete Kit

Installing an EGR delete kit is a relatively simple process that can be completed in a few hours. The first step is to purchase a kit that’s compatible with your vehicle.

  • Next, disconnect the battery and remove the air intake.
  • Once you have removed the air intake, you’ll be able to access the EGR system.
  • At this point, you’ll need to remove the EGR valve and the EGR cooler.
  • Once you have successfully removed these components, you can install the EGR delete kit. The kit will come with instructions on how to install it properly.
  • Once the kit is installed, you can reconnect the battery and the air intake.

Ideally, though, you should consult with a professional mechanic before installing an EGR delete kit. This is because the process can be complicated and, if done incorrectly, could lead to engine damage.

The Takeaway

The exhaust gas recirculation system helps to reduce carbon emissions by recirculating a small portion of the gases produced during combustion. This negatively affects engine performance though so some drivers choose to delete the system with an aftermarket kit. This process can improve fuel economy and boost power output. However, before attempting this aftermarket alteration, consult with a mechanic to guarantee it’s installed correctly.

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