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Home >> Ford >> 1990 >> Probe GL, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel Pressure Check >> Fuel Pressure (CFI Systems)
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Fuel Pressure (CFI Systems)

NOTE: For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article.
  1. Disconnect wiring at inertia switch. Inertia switch is located behind trim panel in right rear side of cargo area on Sable and Taurus station wagons and behind trim panel on left side of trunk on all other models. Crank engine for at least 15 seconds to reduce system fuel pressure.
  2. Disconnect fuel supply line at throttle body. Install In-Line Adapter (D85L-9974-B) and Fuel Pressure Gauge (T87L-9974-A) on throttle body. Reconnect inertia switch and start engine. Check fuel pressure at idle and when accelerating engine. Pressure should remain stable through entire period of acceleration.
  3. If gauge readings are correct, disconnect inertia switch. Crank engine for 15 seconds to reduce fuel pressure. Remove gauge and in-line adapter. Install original fuel line and connect inertia switch. Start engine and check for fuel leaks.
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