How does the EGR work in a car?
How does the EGR work in a car?
The EGR valve recirculates burned exhaust emissions back into the intake system so the emissions can be re-burned, or “recycled,” out the exhaust. The system operates by the opening and closing of solenoid valves, regulated by a diaphragm.
When to replace the EGR valve on a diesel engine?
The EGR valve on a diesel engine usually gets a lot more dirt in it, and it has to be replaced and cleaned more often. The carbon build up can also destroy the EGR valve and you have to replace it more often. A lot of people, reprogram the EGR valve to not function to reduce the amount of carbon build up in the engine.
When does the idle air control valve change?
When the engine is running but the vehicle is not moving, this means the engine is idling. During this time, the number of revolutions per minute (RPM) inside the engine will change. The idle air control valve is responsible for managing the engine idle speed.
What are the symptoms of a bad EGR valve?
When there is a problem with the EGR Valve, the check engine light or EPC(VW) light may occur on your dashboard. The two main issues EGR valves face are that, either the valve stays open or it shuts completely. Here are some common symptoms you will notice if you have a bad EGR valve.
The EGR valve recirculates burned exhaust emissions back into the intake system so the emissions can be re-burned, or “recycled,” out the exhaust. The system operates by the opening and closing of solenoid valves, regulated by a diaphragm.
What happens when you block off the EGR valve?
The exhaust produced by the combustion process contains carbon dioxide, which is partly water. The carbon dioxide, along with burnt exhaust gases, enters through the EGR valve into the intake to reduce harmful NOx (nitrogen oxide) emissions, but it also cools the combustion chamber.
What happens when the EGV is blocked off in a car?
Stalling, a complete engine shut-off condition, can happen when the EGV has clogged, shutting off the flow of emission gases. This will happen most predominately at idle — and may not happen all the time. The exhaust produced by the combustion process contains carbon dioxide, which is partly water.
Why does an unpluged EGR valve run better then?
There should be no vacuum to the valve at idle (pintel should be seated) perhaps the line in connected to an incorrect source. A engine without mechanical defects (not yours) and a properly configured and operating EGR system will not cause a car to ping.
What happens when the EGR passageway is blocked off?
When the EGR passageway becomes blocked off it keeps exhaust emissions and air from circulating in the engine, causing a suffocating condition. The engine idle will be rough, frequently stumbling and unable to hold a steady idle rpm. The rpm may be sporadic, raising and lowering randomly.
Stalling, a complete engine shut-off condition, can happen when the EGV has clogged, shutting off the flow of emission gases. This will happen most predominately at idle — and may not happen all the time. The exhaust produced by the combustion process contains carbon dioxide, which is partly water.
