D 150 Pickup V8-318 5.2L (1984)
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EGR Valve: Testing and Inspection
The CCEGR valve can be tested for proper operation by placing it in ice and cooling it to below 40° F. Using a suitable vacuum pump and gauge tool
C-4207 or equivalent, apply vacuum of at least 10 inches Hg to valve nipple corresponding to the blue striped hose. If vacuum reading drops more than 1
inch in one minute, replace CCEGR valve.