fuel

Fuel Pressure Regulator

for 2017 Ford F-150 5.0L V8 Coyote · RWD

Editorial review:Chris Hackleman — Master Technician · 20+ years · Jeff Moore — Master Mechanic · 20+ years

Difficulty

Moderate

Time

1.3 h

Tools

Steps

✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman & Jeff Moore — 20+ years each). Always follow the vehicle's factory service information and torque specs.

This procedure covers the replacement of the fuel pressure regulator on the 2015-2020 Ford F-150 with the 5.0L Coyote V8 engine, including fuel system depressurization and component removal.

Warnings

⚠️Fuel is highly flammable. Ensure work area is well-ventilated with no open flames, sparks, or smoking. Have a fire extinguisher nearby.

⚠️Fuel system operates under high pressure (55-65 psi). Failure to properly depressurize can result in fuel spray causing fire or injury.

⚠Gasoline is toxic and carcinogenic. Avoid prolonged skin contact and breathing vapors. Work in a well-ventilated area.

⚠Perform this work with engine cold to minimize fuel vapor and prevent burns.

Tools required

Fuel pressure gauge with Schrader valve adapterEssential

Torque wrench (5-35 Nm range)Essential

Fuel line disconnect tool setEssential

Socket set (8mm, 10mm)Essential

Screwdriver set (T20, T25 Torx)Essential

Safety glassesEssential

Shop towels or drain panEssential

Nitrile gloves

Flashlight or work light

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Parts

Fuel pressure regulator × 1 — Use OEM Ford specification
Fuel line O-rings × 2 — Use OEM specification
Regulator mounting gasket or seal × 1 — Verify if included with regulator

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Preparation

Park vehicle on level ground and engage parking brake
Ensure engine is completely cold
Disconnect negative battery terminal and wait 2 minutes
Place shop towels or drain pan under work area to catch fuel spillage
Remove engine cover by pulling upward on cover retaining grommets

Procedure

1
Depressurize fuel system
Locate the fuel pressure test port on the fuel rail (typically on driver side rail). Attach fuel pressure gauge to Schrader valve. Slowly open valve to release pressure into gauge or approved container. Monitor gauge until pressure reads zero. Close valve and remove gauge.
⚠️Wear safety glasses. Fuel may spray during initial pressure release. Keep face and ignition sources away from valve.
2
Disconnect fuel supply line
Locate the fuel supply line connection at the fuel rail. Use appropriate fuel line disconnect tool to release the quick-connect fitting. Pull line straight back to disconnect. Cap or plug the fuel line to prevent contamination and fuel leakage.
⚠Residual fuel will drain from line. Have shop towels ready to catch spillage.
3
Disconnect electrical connectors
Disconnect the electrical connector from the fuel pressure regulator by pressing the release tab and pulling connector straight off. Note connector orientation for reinstallation. If present, disconnect any fuel injector connectors that obstruct access.
4
Remove vacuum line (if equipped)
Some fuel pressure regulators have a vacuum reference line. If present, carefully disconnect the vacuum hose from the regulator by gently twisting and pulling. Inspect hose for damage and replace if cracked or brittle.
5
Access fuel pressure regulator
The fuel pressure regulator is typically mounted on the passenger side fuel rail or integrated into the fuel rail assembly. Remove any wire harness clips or brackets obstructing access to regulator mounting screws. Note the position of all components for reassembly.
6
Remove regulator mounting screws
Using the appropriate Torx screwdriver (typically T20 or T25), remove the regulator mounting screws. On this application, there are typically 2-3 screws. Keep screws organized and inspect for damage or thread wear.
Torque spec
Regulator Mounting Screws5 Nm (4 lb-ft)
7
Extract fuel pressure regulator
Carefully pull the fuel pressure regulator straight out from the fuel rail. The regulator may be seated with O-rings or a seal, so use gentle rocking motion if needed. Be prepared for residual fuel to drain from the regulator and rail cavity. Remove and discard old O-rings or gasket.
⚠Do not use excessive force or pry tools as this may damage the fuel rail sealing surface.
8
Clean mounting surface
Thoroughly clean the fuel rail regulator mounting surface and cavity with lint-free shop towels. Remove all old gasket material, debris, or fuel residue. Inspect the mounting surface for scratches, corrosion, or damage that could prevent proper sealing.
9
Install new O-rings
Install new O-rings onto the fuel pressure regulator. Lightly lubricate O-rings with clean engine oil or fuel to ease installation and prevent tearing. Ensure O-rings are properly seated in their grooves and not twisted.
ℹ️Always use new O-rings. Reusing old O-rings will likely result in fuel leaks.
10
Install new fuel pressure regulator
Carefully insert the new fuel pressure regulator into the fuel rail, ensuring proper alignment. Push regulator firmly into position until it is fully seated. The regulator should sit flush against the mounting surface.
11
Secure regulator mounting screws
Install the regulator mounting screws and hand-tighten. Using a torque wrench, tighten screws to specification in a cross-pattern sequence to ensure even seating. Verify regulator is properly seated and secure.
Torque spec
Regulator Mounting Screws5 Nm (4 lb-ft)
12
Reconnect vacuum and electrical connections
If equipped, reconnect the vacuum reference line to the regulator, ensuring a secure connection. Reconnect the electrical connector to the fuel pressure regulator until it clicks into place. Reconnect any fuel injector connectors that were removed.
13
Reconnect fuel supply line
Remove cap or plug from fuel supply line. Inspect quick-connect fitting for damage. Push fuel line onto fuel rail connection until it clicks and locks into place. Gently tug on line to verify secure connection.
14
Reinstall components and pressurize system
Reinstall any brackets, wire harness clips, and engine cover removed during disassembly. Reconnect negative battery terminal. Turn ignition key to ON position (do not start) for 5 seconds, then OFF. Repeat 3-4 times to pressurize fuel system. Inspect all connections for fuel leaks.
⚠️Immediately address any fuel leaks before starting engine. Fuel leaks present serious fire hazard.

Reassembly

Ensure all fuel line connections are secure and properly locked
Verify all electrical connectors are fully seated with locking tabs engaged
Confirm engine cover is properly installed on all mounting grommets
Double-check work area for tools or parts left in engine bay

Verification

With engine running, verify fuel pressure is within specification (55-65 psi) using fuel pressure gauge
Inspect all fuel connections for leaks while engine is running and at operating temperature
Verify no fuel odor is present in engine bay or cabin
Test drive vehicle and confirm normal acceleration and no fuel-related fault codes
Recheck all connections after test drive for signs of fuel seepage