The Exhaust Gas Recirculation valve, or EGR valve, is one of the most critical components in your car’s engine. It regulates how much unburned fuel is sent back into the exhaust pipe to reduce emissions. However, suppose it becomes worn out or damaged. In that case, it can become less effective at its job, leading to severe engine damage. So, as the warning signs of an EGR valve problem start to surface, you may want to consider doing something about it before it becomes too late.
How Does the EGR Work?
The EGR valve is a relatively simple component that controls how much of the exhaust gases are recirculated back into the combustion chamber to be burned again. EGR valves are necessary because they help control the temperature inside the combustion chamber by recirculating exhaust gas to be burned in the cylinders. The EGR valve remains closed, which blocks the recirculation of gases while the vehicle is warming up.
Once the engine reaches average operational temperature, the EGR valve opens and allows exhaust gas back into the engine. EGR valves on older vehicles are usually vacuum-operated valves, while EGR valves on modern cars are computer-controlled. The Engine Control Unit (ECU) will open and close the EGR valve on a modern engine more efficiently than the older vacuum design.
Signs of a Failing EGR Valve
The signs of a failing EGR valve should not be ignored. These symptoms include poor engine performance, poor fuel economy, and poor acceleration. In addition, you may notice rough idling, engine stalling during idle, a fuel smell coming from the engine, and an active check engine light.
Knocking noises and increased engine emissions are common symptoms of a failing EGR valve. Because many of the signs of a failing EGR valve can be caused by other factors, it is vital to have these symptoms diagnosed by a technician.
How is a Failing EGR Valve Repaired
The EGR valve will need to be replaced by your mechanic if it is failing. Your mechanic typically uses computerized diagnostic equipment to diagnose a failed EGR valve. Fortunately, EGR valve diagnosis and replacement is usually a relatively simple procedure that an experienced professional can handle without much trouble.
If you notice any of the symptoms of a failing EGR valve, don’t ignore them; instead, see your trusted mechanic right away to save your engine from unnecessary damage and yourself from an expensive repair bill.
