Vacuum Diagrams: Introduction: Notes

NOTE: References to Econoline include Cutaway and RV Cutaway. References to F250-550 Super Duty Pickup include Cab & Chassis.

This article contains underhood schematics of vacuum hose routing. Canada and some states or metropolitan areas in the United States require periodic emission, or Inspection/Maintenance (I/M) tests. Use these vacuum diagrams during a visual inspection for one of these tests. This will assist in identifying improperly routed vacuum hoses, which may cause driveability and/or computer-indicated malfunctions.