What's The EGR Valve in An Engine?

The EGR valve helps your car more efficiently and completely burn fuel by recirculating a portion of your exhaust and running it through the combustion process again. This results in a cooler, more complete burn of the fuel which decreases you car's noxious emissions by prohibiting the formation of some harmful gases.

 This is a typical EGR valve. It's easy to clean or replace your EGR valve if your car or truck's performance starts to suffer.

The Basics

The EGR valve helps your car more efficiently and completely burn fuel by recirculating a portion of your exhaust and running it through the combustion process again. This results in a cooler, more complete burn of the fuel which decreases you car's noxious emissions by prohibiting the formation of some harmful gases.

Pros

• The EGR valve is vital to your car's emission controls. Exhaust gas recirculation helps to keep huge amounts of unburned fuel from being released into the atmosphere. This unburned fuel is thought to be a huge contributor to greenhouse gas build-up. That's why an EGR system became mandatory on all new vehicles some time ago.

• Cons

• When the EGR valve goes bad, it must be replaced. Unlike some emissions control devices that can go bad without affecting the drivability of the car or truck, a bad EGR valve can really affect the engine's performance, or even cause it to stop running altogether. The good news is you can clean it.

exhaust gas recirculation which circulates the unburned particles 

in to the combustion chamber to improve the efficiency of engine.

EGR valves are the top reason why most cars do not pass emission tests....