All Other Models

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. For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article.
If fuel pressure is not within specifications, check fuel pressure regulator. With engine running, connect hand vacuum pump and apply vacuum to regulator.
Ensure fuel pressure changes as vacuum at regulator is increased and decreased. If no pressure change occurs, replace regulator and recheck system. For additional testing information, go to CIRCUIT TEST HC in TESTS W/CODES - 5.8L article.

Fig 1: Identifying Fuel Pump Self-Test Connector

Courtesy of FORD MOTOR CO.

FUEL PRESSURE SPECIFICATIONS

Application

Specification

Fuel Line Pressure

⁽¹⁾

Fuel Volume

⁽²⁾

⁽¹⁾	For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article.

⁽²⁾	Volume is one pt. (.5L) in 30 seconds.