Midsize LTD L4-140 2.3L SOHC (1986)
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Canister Purge Solenoid: Testing and Inspection
With valve de-energized, apply 5 in.-Hg. to "vacuum source" port, valve should not pass air; if it does, replace valve.
While applying 9-14 volts DC to valve, the valve will open and pass air. If it does not, replace valve.