Is the EGR valve supposed to make noise?
Another symptom of a bad or failing EGR tube is rattling noises from the engine bay. If the EGR tube breaks or comes loose, it can cause rattling noises as a result of the metal tube vibrating. The noise may be quiet at idle, and become more noticeable when accelerating.
What problems does a faulty EGR valve cause?
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. It can also cause vehicle emissions to increase.
Can a bad EGR valve affect engine performance?
Well, EGR problems depend on whether the valve is stuck closed or stuck open. These are the symptoms of a bad EGR valve that you should be aware of. As the EGR valve monitors the volume of exhaust gases entering the engine, it is obvious that any issue with it will affect the engine performance.
When to open and close the EGR valve?
The valve remains closed, until the engine is warm and is, operating under load. But, as the load increases and combustion temperatures start to rise; the valve opens and starts, to leak exhaust back into the intake manifold. Finally, this has a quenching effect that, lowers combustion temperatures and reduces the formation of (NOx).
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.
Why does the EGR valve open on a Trafic Vivaro?
Under certain circumstances it opens up to feed exhaust gases into the air intake of the engine. There are several reasons for this, the first is that it heats the engine up quicker from a cold start, which leads to improved efficiency on short journeys as diesel engines don’t run efficiently when cold.