EGR System Test

WARNING: Apply parking brake and/or block wheels before performing EGR system test.

To ensure proper operation of the EGR system, all passages and moving parts must be free of deposits that could cause plugging or sticking. Ensure that the system hoses does not leak. Replace leaking components.

Inspect hose connections between intake manifold, EGR solenoid and transducer, and the EGR valve.
- Replace hardened, cracked, or damaged hoses. Repair or replace faulty connectors.

Check the EGR control system and EGR valve with the engine fully warmed up and running (engine coolant temperature over 170°F).