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You might have heard of an EGR valve, or perhaps you’ve already had problems with yours and have had to get it fixed. If so, you’ll know it can get expensive. In this post, we’ll look at what an EGR valve actually is, how to spot the problems, and how the EGR delete procedure can help more quickly and cost effectively than getting it repaired or replaced.

What is an EGR valve?

EGR stands for Exhaust Gas Recirculation. The EGR valve reduces the temperature of the gases produced during the combustion of fuel in the engine and also helps to reduce the release of nitrogen oxides into the environment.

Diagram of EGR valve.

During combustion, the engine sucks air from the atmosphere and mixes it with the fuel. As the air and fuel start burning, the temperature increases, which causes the emission of nitrogen oxides. The EGR valve opens and closes as required to return a small amount of the exhaust gases back into the combustion chamber of the engine, via the intake manifold. This chamber lowers the combustion temperature and reduces the nitrogen oxide emission rate. A properly working EGR valve should control the flow of recirculated exhaust gases according to the engine requirement at any given moment.

How do you know when there is a problem?

EGR issues are a very common fault with many makes and models of vehicle, and can lead to costly repairs. The cost to replace and refit an EGR can be £500 or more, not including if the faulty valve has caused damage to other parts, which themselves might need replacing or repairing. It’s easy to see how EGR problems can lead to spiralling costs.

There are several signs and symptoms of a faulty EGR valve. Left unresolved, faulty EGR valves can affect the performance of your vehicle and threaten the health of your engine. If you think your EGR valve might not be working properly, it’s best to limit driving as much as possible.

A defunct EGR valve causes unclean combustion. This causes the engine to run at the wrong temperature, and soot to clog up the cylinder head and other components. This soot further worsens the handling of the car and can lead to expensive subsequent damage, so that even more parts have to be replaced.

EGR valve clogged with soot.

Here are the most common signs that you might have a problem with your EGR valve:

  • Appearance of engine indicator light or exhaust gas warning light
  • Black exhaust smoke
  • Decreased engine power
  • Higher fuel consumption
  • Jerky engine while driving

How an EGR delete can help

EGR delete software prevents the EGR valve from opening and closing; it simply disables it. In the vast majority of cases this is the quickest and most appropriate approach, and does not require blanking plates.

  • EGR delete is the most cost-effective way of resolving any EGR issues you are experiencing, and future-proofing any further EGR-associated problems.
  • Cleans up the exhaust system – EGR delete prevents the build-up of soot, which blocks airflow. This allows the exhaust to run cleaner and prevent any soot from entering the engine or combustion chamber.
  • Potential gains in fuel efficiency – a cleaner exhaust system runs more efficiently. Without the “drag” of the soot and other contaminant buildups, the engine can run a lot more smoothly and thus improve fuel economy.
  • Lowers engine temperature – another consequence of the engine running more smoothly is a lower overall engine temperature. When blockages start to occur, however minor, the engine has to work harder to compensate for them, so bypassing the EGR valve means the engine can remain working at a steady rate, thus maintaining a steady temperature.
  • More horsepower and throttle response – another part of the system that ends up getting clogged by the EGR is your intake, as well as your turbo. Keeping it free from these buildups allows maximum horsepower to be retained. It should also deliver better throttle response thanks to maximized oxygen flow.

At Prospect Automotive we are experienced in EGR delete methods. Contact us today to find out how our EGR delete software can benefit you.