What does an EGR vacuum solenoid do in a car?
The EGR vacuum solenoid opens and closes a vacuum line to the EGR valve. An exhaust gas recirculation (EGR) vacuum solenoid is an electrically controlled vacuum switch. It is a component of the exhaust gas recirculation system found on motor vehicles that are equipped with exhaust emission controls.
What should I do if my EGR valve is not working?
If the stem or diaphragm doesn’t move, disconnect the thin vacuum hose from the top of the valve. Place your finger on the opening of the vacuum hose you just disconnected. Increase engine rpm again as you did in the previous step. You should feel vacuum or a slight pressure on your finger tip, depending on the particular system type.
Why is my exhaust gas recirculation valve not working?
After miles of service, the exhaust gas recirculation (EGR) system — especially the EGR valve — will lead to engine performance problems due to carbon buildup, components mechanical problems, or vacuum hose leaks.
How to test an EGR valve with a hand mirror?
As you do this, watch the valve diaphragm movement. Use a small hand mirror for this, if necessary. If the stem or diaphragm doesn’t move, disconnect the thin vacuum hose from the top of the valve. Place your finger on the opening of the vacuum hose you just disconnected. Increase engine rpm again as you did in the previous step.
What does a bad EGR solenoid do?
One of the first symptoms of a possible problem with the EGR control solenoid is engine performance issues. If the EGR solenoid has any issues, it can cause the finely tuned air fuel ratio to be thrown off. This may result in a decreased power, acceleration, fuel economy, as well as an increase in emissions.
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.
What is the function of the EGR solenoid?
The EGR solenoid regulates small amounts of exhaust gas.The EGR which means exhausts gas recirculation.
How does an EGR vacuum solenoid work?
The solenoid contains a coil which magnetically controls the position of a disc to regulate the vacuum. As the duty cycle to the coil increases, the vacuum signal passed through the solenoid to the EGR valve also increases.