Grand Marquis V8-351 5.8L (1982)
Fig. 61 Normally open combination air bypass/air control valve less bleed
Normally Open Valves
1.
Disconnect hoses from outlets A and B, Fig. 61.
2.
Disconnect and plug vacuum lines to ports D and S.
3.
Run engine at 1500 RPM. There should be air flow at outlet B.
4.
Apply 8---10 inches Hg vacuum to port S and run engine at 1500 RPM. There should be air flow at outlet A.
5.
Reconnect vacuum line to port D and ensure that vacuum is present.
6.
Run engine at 1500 RPM. Air should flow out of bypass vents.
7.
Reconnect vacuum hoses to original positions.