What happens if you close off the EGR valve?
What happens if you close off the EGR valve? A clogged or closed off EGR valve will sometimes give off an audible noise resembling a "pinging" or light "knocking" coming from the engine. The trait is nearly similar to pre-ignition or detonation, both caused by abnormally high combustion chamber temperatures. What should I do if my EGR light is not working? The repair of this condition is removal of the EGR valve and inspection of the passageway to check for a blockage. Each model vehicle has different procedures for clearing the passageway due to many different configurations of the system....