Chevrolet 17110799 Valve Assembly, Egr

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The Exhaust Gas Recirculation (EGR) system reduces NOx emissions by reintroducing exhaust gas into the combustion chamber via the EGR valve on the intake manifold. This valve, opened by manifold vacuum, operates primarily during warm engine conditions above idle. The system adjusts gas flow based on manifold vacuum and exhaust backpressure, using a negative backpressure valve. An ECM-controlled solenoid refines EGR flow, receiving input from various sensors. Excessive EGR can cause stalling or surging, while insufficient flow might lead to engine overheating or emission issues. To maintain the system, inspect hoses and connections, ensure EGR valve operation, and check the solenoid. Replace faulty parts and clean the valve and passages when needed.

The EGA valve is located on the intake manifold, adjacent to the carburetor.

Common problems associated with the EGR system include rough idling, stalling, and poor engine performance.

If the diaphragm does not move or moves only with much effort, it is recommended to replace the EGR valve with a new one.

If you are unsure about the quality of the valve, you can compare the free movement of your EGR valve with a new valve.