929 V6-3.0L SOHC (1989)
EGR Valve: Testing and Inspection
SYSTEM INSPECTION
NOTE: Check the condition of the wiring harness and/or vacuum lines and connectors before checking the sensors or switches.
1.
Start the engine.
Checking EGR Operation
2.
Accelerate the engine and check that the diaphragm of the EGR control valve does not move while the engine is still cold.
3.
Warm up the engine to normal operating temperature and run it at idle.
WARNING: Be careful when checking because the surrounding area is very hot!
4.
Accelerate the engine and check that the diaphragm of the EGR control valve moves upward.
SOLENOID VALVE (EGR, VACUUM SIDE)
EGR Solenoid Valve
1.
Disconnect the vacuum hoses.
2.
Blow through the vacuum hose and make sure air does not flow.
3.
Disconnect the solenoid valve connector.
4.
Apply 12V and ground to the solenoid valve as shown.
5.
Blow through the vacuum hose and make sure air flows.
6.
If not correct, replace the solenoid valves.
SOLENOID VALVE (EGR, VENT SIDE)
EGR Solenoid Valve
1.
Disconnect the vacuum hoses.