isuzu Workshop Repair Guides

Isuzu Workshop Service and Repair Manuals

Positive Crankcase Ventilation > < EGR Valve|Locations|Page 1973
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EGR Valve: Testing and Inspection

1.

Warm engine to operating termperature (120° F / 60° C).

2.

Place finger on on EGR valve diaphragm and accelerate engine, diaphragm should move.

3.

Disconnect vacuum hose from EGR valve.

4.

Using a vacuum pump, apply 10" of vacuum to the valve. It should move and engine should run poorly or stall.

5.

If valve passes above test use CHART C-7A. If valve fails, replace valve.

Positive Crankcase Ventilation > < EGR Valve|Locations|Page 1973