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Home >> Ford >> 2000 >> Expedition 5.4 L, RWD >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panels - Analog - Expedition, F150/F250 Light-Duty Pickups & Navigator >> System Tests >> Test W: Boost Gauge Inoperative (Lightning Models Only)

Test W: Boost Gauge Inoperative (Lightning Models Only)

  1. Disconnect boost gauge pressure line from intake manifold. Apply 10 psi vacuum to boost gauge pressure line. If boost gauge indicates maximum boost pressure, inspect for plugged manifold fitting. If boost gauge does not indicate maximum boost pressure, go to next step.
  2. Disconnect boost gauge pressure line from instrument cluster. Apply 10 psi vacuum to boost gauge. If boost gauge indicates maximum boost pressure, replace boost gauge pressure line. If boost gauge does not indicate maximum boost pressure, go to next step.
  3. Disconnect all instrument cluster connectors. Inspect connectors for corrosion and pushed out pins. Connect all instrument cluster connectors, ensuring they are connected correctly. Operate system and verify if concern is still present. If concern is still present, replace instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. If concern is not present, system is operating correctly at this time. Clear DTCs and repeat self-test.
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