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Home >> Ford >> 1990 >> Bronco II RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test Kc - Air Management System (Am1/Am2) >> Test Kc: Step 7
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Test Kc: Step 7

7) Check AM1/AM2 Solenoids For Internal Vacuum Leaks  Connect a vacuum pump to AM1 solenoid supply port. Connect a vacuum gauge to AM1 solenoid output port. Apply 15 in. Hg vacuum and observe gauge. Repeat test for AM2 solenoid. If vacuum gauge reading holds vacuum for each solenoid, repair vacuum source for blockage or leaks. Repeat QUICK TEST. If not, replace solenoid assembly and repeat QUICK TEST.