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Fuel Pressure

WARNING: Inspect fuel system for leaks or damage before testing fuel pump.
NOTE: For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article.
  1. Release fuel pressure. Install fuel pressure gauge. Turn ignition on and read fuel pressure. Start engine and read fuel pressure. Compare fuel pressure reading on fuel pressure gauge with specifications in FUEL PUMP SPECIFICATIONS  table.
  2. If fuel pressure is not within specifications, check fuel pressure regulator. With engine running, connect hand vacuum pump and apply vacuum to regulator. Check if fuel pressure is affected with increased vacuum at regulator. If no pressure change occurs, replace regulator and recheck. For additional testing information, see FUEL SYSTEM in SYSTEM/COMPONENT TESTS article in the ENGINE PERFORMANCE section.
Fig 1: Fuel Pump Self-Test Connector ID
G90I04610Courtesy of FORD MOTOR CO.
FUEL PUMP SPECIFICATIONS

Application Specification
Pressure (1)
Volume (2)
(1) For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article.
(2) Volume is 1 Pt. (.5L) in 30 Seconds.