F 150 4WD Pickup V8-281 4.6L VIN W EFI (1997)
Fuel Pressure Release: Service and Repair
Fuel Pressure Port (Typical)
1. Remove the schrader valve cap and attach EFI/CFI Fuel Pressure Gauge.
2. Open the manual valve on EFI/CFI Fuel Pressure Gauge and Perform Fuel Pressure Release.
NOTE: Open manual value slowly to relieve system pressure.
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This will drain some fuel out of the system.
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Place fuel in suitable a container.