Why would an EGR valve need to be replaced?
On older cars operated by engine vacuum, the EGR valve diaphragm can deteriorate and leak, causing a rough idle and a check engine light. In that case, the valve should be replaced. Also, over time the valve can accumulate carbon buildup and stick open, causing a rough running engine.
Does replacing EGR valve improve performance?
A non functioning or clogged EGR can lower gas mileage, raise under hood temperatures and cause you to lose horsepower as well. If you are looking to save money and your motor is not throwing an EGR code, a simple clean and fresh gasket install will restore like new performance to your once faulty EGR valve.
What happens if you don’t replace EGR?
A faulty EGR valve can cause problems with the flow and operation of the EGR system leading to performance issues including a reduction in power, reduced acceleration and decreased fuel efficiency. EGR valves can become stuck ‘open’ or ‘closed’ due to a build-up of soot particles, carbon deposits and dirt from fuel.
When to replace or clean the EGR valve?
Or, the EGR position sensor can fail, causing a check engine light. If your car is running fine at idle and you don’t have a check engine light, there’s no need to replace or clean an EGR valve. Some shops recommend periodic cleaning. I think that’s a waste of money.
How does the EGR valve work in a car?
The EGR valve is part of the EGR system – one that connects from the exhaust manifold of your car and opens back up into the intake manifold (this is what brings air into the engine). The valve allows the exhaust gases to be sent into the engine with the fresh air, resulting in it igniting a second time – hence the name, exhaust gas recirculation.
Why does my check engine light come on when my EGR valve is stuck?
Whether the EGR valve is clogged, stuck open, or stuck closed, you’re going to get a check engine light. While the check engine light will usually point you straight to the EGR valve, it is possible that it might come on due to a symptom instead of a cause.
Are there any disadvantages to using an EGR valve?
There are some disadvantages of EGR as well such as loss in fuel economy, low performance and, in diesel-engine cars, the production of soot increases. However, modern engines use clever technologies for an efficient process, for example, new diesel engines now use EGR cooler which cools down the exhaust gasses by passing the coolant.