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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test S - System Check >> Test S: Step 7
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Test S: Step 7

7) Check Vacuum Lines  Check vacuum lines for correct routing. Refer to VECI decal. Check MAP sensor vacuum line for leaks or blockage. If vacuum lines are okay, replace MAP sensor. Remove MAP/BP tester. Recheck system operation. If vacuum lines are not okay, repair as necessary. Rerun QUICK TEST.