Buick 17113476 Valve Asm,EGR

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The EGA valve is located in the intake manifold beside the carburetor. Most times, a jammed or rusted EGA valve will be the cause of emissions system failure. To verify if it's functional, put your hand below EGA valve when the engine is cold to avoid burns and manually press down on diaphragm. The diaphragm should allow you to perform some modestly exerted up and down movement in its case. If it doesn't move at all or moves with great difficulty replace it with another one of EGA.

The EGR system operates based on throttle position and engine temperature, preventing recirculation during idle, deceleration, or cold starts to maintain the necessary air-fuel mixture.

The most common cause of faults in the emissions system related to the EGA valve is a stuck or corroded valve.

The EGR system operates based on throttle position and engine temperature, preventing recirculation during idle, deceleration, or cold starts to maintain the necessary air-fuel mixture.

With the engine cold, you can reach under the EGR valve and manually push on the diaphragm. Using moderate pressure, you should be able to press the diaphragm up and down within the housing.

To check the EGA valve, reach under it with the engine cold and manually push on the diaphragm.

The EGR valve or thermal vacuum switch can be replaced as needed.

The EGR solenoid should be checked for movement and vacuum.

The most common cause is a stuck or corroded EGR valve.