Genuine Chevrolet El Camino EGR Vacuum Solenoid

Chevrolet El Camino EGR Vacuum Solenoid Parts Questions & Answers

• Solenoid Assembly, Egr Control Valve Relay
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  Q: What is the purpose and functioning of the EGR Vacuum Solenoid and EGR Valve on Chevrolet El Camino?

  A: The EGR system reduces NOx emissions by recirculating exhaust gas back into the combustion cycle. The EGR valve on the intake manifold should be checked for proper functioning. The engine should lose speed or stall when manually depressing the EGR diaphragm. The vacuum signal to the EGR valve should be checked and the vacuum hose and lines inspected for issues. The thermal vacuum switch regulates the EGR valve based on engine temperature and should be tested with a vacuum gauge. The EGR valve or thermal vacuum switch should be removed following the necessary steps and a new gasket and thread sealer used when reinstalling. The EGR system requires minimal maintenance with occasional inspections of vacuum hoses and valves.