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Home >> Mercury >> 1987 >> Lynx XR3 >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - CFI System >> Testing >> Inertia Switch >> Fuel Pump Pressure & Delivery Volume

Fuel Pump Pressure & Delivery Volume

  1. Disconnect wiring at inertia switch. Inertia switch is located behind trim panel on left side of trunk. 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-C) 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.
FUEL PRESSURE SPECIFICATIONS (1)

Engine Pressure: Engine Running Pressure: KOEO
All CFI 13-17 (.91-1.12) 13-17 (.91-1.12)
(1) psi (kg/cm2 )