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Pre-Check Visual Inspection

NOTE: System will not function properly if air, vacuum or exhaust leaks exist, or if there are poor electrical connections; therefore, the following checks should be made.
  1. Inspect all vacuum lines for proper connections and proper hose condition.
  2. Check electrical harness for loose or detached connectors, broken or frayed wires, loose terminals, shorting, corrosion, or bad ground connections.
  3. Check major components for signs of physical damage.
  4. With engine running (if possible), check around exhaust manifold and exhaust gas oxygen sensor for leaks.
    NOTE: 2.3L Turbocharged models with Automatic Transmission have a low-pressure electric fuel pump located in the fuel tank. Pump will not operate in event of oil pressure loss or if inertia switch is open.
    Fig 1: Wiring Diagram for 2.3L Feedback Carburetor Electronic Engine Control System
    G09339823Courtesy of FORD MOTOR CO.