Plugged Exhaust Passage

With EGR valve removed, plug intake manifold side passage using a suitable plug. Start engine and listen for exhaust noise. If no exhaust gas escapes from open EGR port, exhaust passage is plugged.

NOTE: Ensure shop exhaust is not connected during the following steps. Do not allow engine to run longer than 15 seconds.

2) Remaining test checks ability of EGR valve to interact with exhaust system. System uses a negative backpressure EGR valve which should hold vacuum with engine off.
3) When engine is started, exhaust backpressure at base of EGR valve should open valve's internal bleed. This will vent applied vacuum, allowing valve to seat.