So, the (EGR) valve, is an emission control device, which helps maintain, the combustion chamber temperature.
Consequently, in an effort to reduce, the formation of nitrogen oxides (NOx).
Furthermore, the exhaust gas recirculation valve, draws exhaust, by means of intake vacuum, which dilutes, the incoming air/fuel mixture.
Consequently, to lower the temperature in the chambers, bringing the (NOx) within decent limits.
In addition, the (EGR) valve, also reduces the engine’s octane needs. As a result, to lower the danger of detonation (spark knock).
So, what is the most common problem, with an (EGR) valve? Consequently, when carbon build up on the valve, causes it to stick. In worst cases, the (EGR) valve and the passages, can be completely clogged up. So, symptoms of a valve, that is stuck open, include a rough idle and stalling.
If it’s not the (EGR) valve, could it be something else?
So, there are other engine performance problems, which are typical of an (EGR) valve failure. But, can also indicate problems in other parts of the system.
Consequently, this can include the likes of:
- Faulty spark plugs.
- Spark plug wires.
- Fuel filters.
- Fuel pump regulator.
- Engine sensors.
Increased hydrocarbon emissions, can be a result of:
- A leaking fuel injector.
- Bad injection timing.
- (EGR) Issues.
- Bad cylinder compression.
- A bad oxygen sensor.
- Malfunctioning catalytic converter.
An increase in (NOx) can be a result of:
- A vacuum leak.
- Clogged fuel injector.
- Low fuel pressure.
- A leaking head gasket.
Rough engine idle, can also be a result of:
- Bad (EGR) valve.
- Faulty ignition coil.
- Vacuum leak.
- The ignition system.
A catalytic converter not working, may also lead to a high hydrocarbon emission reading. The catalytic converter is designed to burn emissions; so that the car exhaust is less harmful.
Choose Your Exhaust Gas Recirculation Valve Help Topic Below
(EGR) Valve – Exhaust Gas Recirculation Valve – What Should You Know
Exhaust Gas Recirculation (EGR) Valve – Types – Failure – Replacement
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