What are the symptoms of a bad EGR valve?

Answer

Exhaust Gas Recirculation (EGR) valves are an important part of a car's fuel exhaust system, as they help reduce the amount of smog released by the car. If you suspect that your EGR valve is broken or malfunctioning, there are several important symptoms to check for.

The car may begin to overheat, as the EGR valve helps lower the temperature inside the combustion chamber. Increased engine temperatures can also cause pinging and knocking sounds in the engine, as fuel and air in the engine will ignite prematurely. Since the EGR valve regulated a car's emissions output, a faulty valve will result in increased emissions when the car is taken in for an emissions test.

If you feel confident making your own repairs to your vehicle and you have a mechanical EGR valve, it is possible to check the valve yourself to see if it is clogged and clean it of any residue. If the EGR valve is electronically controlled, it is imperative to take it in to a mechanic to ensure proper repair or replacement. A damaged or broken valve can reduce the life of your car and cause your car to pollute the environment much more than necessary.
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Q&A Related to "What are the symptoms of a bad EGR valve?"
An EGR valve that fails to close properly can act as a vacuum leak, causing the fuel and air mixture to become too lean, resulting in an engine that sputters and misses at idle. This
http://www.ehow.com/about_6157262_symptoms-bad-egr...
First, lets talk a little bit a bout what does an EGR system do. The EGR valve either electric or mechanic is a component part of the emission system. It was designed to let back
http://wiki.answers.com/Q/What_are_the_symptoms_of...
Symptoms of a bad egr valve on a car will include mis fires,
http://www.chacha.com/question/what-are-the-sympto...
If an EGR valve is stuck open the motor will never start or idle properly. Pull the valve off and see if the plunger is seating against the base. Shove a length of rubber hose in
http://answers.yahoo.com/question/index?qid=200902...
1 Additional Answer
Ask.com Answer for: Bad EGR Valve Symptoms
Symptoms of a Bad EGR Valve
The Exhaust Gas Recirculation system helps reduce your vehicle's harmful emissions. EGR problems can sneak up on you and can quickly become an issue. Knowing what to look for can help prevent problems.... More »
Difficulty: Easy
Source: www.ehow.com
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