What does an EGR valve do?
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.
Does EGR valve cause rough idle?
An EGR valve that is stuck open can result in a fuel-air mixture that is too lean. This can cause a rough idle. A vacuum pump can be used to test whether the EGR valve is operating properly. A faulty EGR valve may also cause your Check Engine light to come on, in which case a code reader may reveal the culprit.
How do I know if my EGR valve is working?
A vacuum-controlled EGR valve is easy to test with a hand-held vacuum pump (see the image). If the EGR valve opens and the vacuum holds for more than a minute, the EGR valve works. If a vacuum diaphragm inside the EGR valve is leaking, the vacuum will drop. Once the vacuum is released, the valve should close fully.
Will a bad EGR valve make a car not start?
The exhaust gas recirculation (EGR) valve introduces a measured amount of exhaust gases; into the intake manifold to get re-burned. But, the valve can fail and stick either open or closed. When the valve sticks open it may prevent your engine from starting.
What is a EGR on a Subaru?
EGRs are exhaust gas regulators. They exist also for emissions. When exhaust gasses leave the engine, not all the fuel will have been burnt. So the EGRs recirculate some of that gas and feed it back into the air intake mix.
When to replace the EGR valve in an engine?
Answer: There is no set time as to how long it takes to replace an EGR (Exhaust Gas Recirculation) valve like changing the oil or spark plugs, etc. You know it needs to be replaced when the check engine light comes on coupled with a rough idle, poor acceleration, and poor gas mileage.
Where is the EGR valve located on a 1998 Mercury Tracer?
Where is the E.G.R. valve located on a 1998 mercury tracer ? It is located directly to the right side of the engine when you are standing at the bumper looking at the engine. It looks like a wide brim hat.
When does a Subaru Outback EGR go bad?
Starts after it’s warm, noticeable under light to medium throttle,at any speed. Feels like a mis-fire, but throws no codes. Coil and wires not too old, dealer items. Throttle body recently cleaned, engine idles perfectly.
Where is the EGR valve on a Dodge Avenger?
The 2009 Dodge Avenger EGR valve is not shaped like the old EGR valve; it is a cylinder shape on this vehicle. It is located on the left side of the engine near the front. Where is the E.G.R. valve located on a 2011 Mazda MX5?