What is the function of EGR valve?
It connects the exhaust manifold to the intake manifold and is controlled by either a vacuum or a built-in electric step motor. The function of the EGR valve is to control the flow of exhaust gas being recirculated depending on the engine load.
When should EGR valve open?
The EGR valve is closed when the engine is starting up. During idle and at low speeds, only a small amount of power is required, and therefore only a small amount of oxygen, so the valve gradually opens – it can be up to 90% open at idle.
Can EGR valve be cleaned?
To clean the valve, wear an acid-resistant pair of gloves. Put on safety glasses, too, as the carbon deposits could become airborne in the process. Spray the EGR valve cleaner onto the carbon deposits. Remove the carbon buildup with the use of a pipe cleaning brush and dull scraper.
What is an EGR valve and what is its purpose?
What is an EGR Valve? The Exhaust Gas Recirculation (EGR) valve is found in most gasoline and diesel engines, and its purpose is to help re-circulate the engine’s emissions by returning them to the combustion chamber rather than sending them to the exhaust emission system.
What is the average life of an EGR valve?
Average Life of EGR Valves. The life of car parts varies as actual drivers may operate cars differently than they are operated for lab tests. An EGR valve may last 100,000 miles if the part is designed well, or it may last only 30,000 miles.
How do you replace an EGR valve?
Replacing The EGR Purchase the correct EGR valve for the make and model of your vehicle. Let your engine cool. Disconnect the battery. Locate the EGR. Disconnect the vacuum line. Disconnect the electrical cable. Use a wrench to remove the bolts on the EGR valve’s mount. Take out the old EGR valve. Clean the valve base and passages.
How serious is an EGR valve?
If the EGR valve is stuck open, it will essentially cause a vacuum leak, leading to inefficient combustion, rough idling, hesitation, and sometimes stalling in extreme cases. This is because the car cannot combust on carbon dioxide from the tailpipe — it needs atmospheric oxygen.