🔧 Expedition - Fuel Pump Replacement

The fuel pump on your Expedition is part of an in-tank fuel pump module. Replacing it usually requires lowering the fuel tank, swapping the module and seal, then reinstalling everything without damaging fuel lines or wiring.

Difficulty Level: Advanced | Estimated Time: 3-6 hours

Assumption: In-tank pump module access is from under the vehicle (tank must be lowered).

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⚠️ Safety & Precautions

• ⚠️ Work outside or in a very well-ventilated area—fuel vapors ignite easily.
• ⚠️ No smoking, sparks, hot lights, or power tools near open fuel.
• ⚠️ Relieve fuel pressure before disconnecting any fuel line to prevent spray.
• ⚠️ Disconnect the battery negative terminal to reduce spark risk.
• ⚠️ Support the fuel tank with a transmission jack (a jack made to balance heavy items).
• ⚠️ If the tank is over 1/2 full, siphon/drain fuel first—full tanks are very heavy.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Fire extinguisher Class B
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Transmission jack (specialty)
• Socket set 8mm–15mm
• Ratchet 3/8" drive
• Torque wrench 10–100 ft-lbs
• Flat trim tool
• Fuel line disconnect tool set (specialty)
• Brass punch (specialty)
• Small hammer
• Drain pan
• Shop towels
• Plastic caps/plugs for fuel lines

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel pump module assembly - Qty: 1
• Fuel pump module tank seal O-ring - Qty: 1
• Fuel pump lock ring - Qty: 1
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels with wheel chocks.
• If possible, drive until the tank is near empty to make it lighter.
• Relieve fuel pressure before disconnecting lines.
• Disconnect the battery negative cable using a 10mm socket.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve fuel pressure

• Open the hood and remove the fuel pump fuse/relay from the fuse box using a flat trim tool.
• Start the engine and let it run until it stalls, then crank for 3–5 seconds more.
• Turn the key OFF and reinstall the fuse/relay later during reassembly.

Step 2: Disconnect the battery

• Use a 10mm socket to remove the negative battery terminal and move it aside so it can’t spring back.

Step 3: Raise and support the vehicle

• Lift the rear of the vehicle with a floor jack (rated 3-ton minimum).
• Set it securely on jack stands (rated 3-ton minimum) at the frame.

Step 4: Support the fuel tank

• Position a transmission jack (specialty) under the fuel tank.
• Use a piece of wood (on the jack saddle) if needed to spread the load.

Step 5: Disconnect the filler neck and vent connections

• Loosen the filler hose clamps using an 8mm socket.
• Carefully twist and pull the filler hose and vent hose off the tank neck.
• Plug the hoses with plastic caps/plugs for fuel lines to reduce fumes.

Step 6: Disconnect electrical connectors at the tank

• Unplug the fuel pump module connector(s) by releasing the tab with a flat trim tool.
• Apply a small amount of dielectric grease during reassembly to help prevent corrosion.

Step 7: Disconnect fuel lines

• Place a drain pan under the fuel line connections.
• Use the fuel line disconnect tool set (specialty) to release the quick-connect fittings.
• Cap the lines with plastic caps/plugs for fuel lines.
• Quick-connects pop off—don’t pry hard.

Step 8: Remove the tank straps

• Remove any shield/bracket blocking strap bolts using a socket set 8mm–15mm and ratchet 3/8" drive.
• While the tank is supported by the transmission jack (specialty), remove the fuel tank strap bolts using a 13mm socket.
• Lower the tank slowly a few inches and check for any remaining hoses/wires before lowering further.
• On reassembly: Torque tank strap bolts to 41 Nm (30 ft-lbs).

Step 9: Clean the area around the fuel pump module

• Use shop towels to wipe dirt off the top of the tank around the pump module.
• Keeping dirt out is critical—grit can damage the new pump and clog the strainer.

Step 10: Remove the lock ring

• Use a brass punch (specialty) and small hammer to tap the lock ring counterclockwise until it releases.
• A brass punch is a softer metal that helps reduce spark risk compared to steel.

Step 11: Remove the fuel pump module

• Lift the module out carefully; angle it as needed to clear the float arm (fuel level sender).
• Let fuel drain from the module into the drain pan.
• Remove the old seal O-ring from the tank opening using a flat trim tool.

Step 12: Install the new seal and module

• Install the new fuel pump module tank seal O-ring in the tank groove.
• Lower the new fuel pump module assembly into the tank, keeping the seal in place.
• Align the module tabs/index marks, then install the new fuel pump lock ring.
• Use the brass punch (specialty) and small hammer to tap the lock ring clockwise until fully seated/locked.

Step 13: Reinstall the fuel tank

• Raise the tank with the transmission jack (specialty) into position.
• Reconnect fuel lines until you hear/feel a click.
• Reconnect electrical connectors.
• Reconnect vent and filler hoses, then tighten clamps using an 8mm socket.
• Install the tank straps and bolts using a 13mm socket.
• Torque tank strap bolts to 41 Nm (30 ft-lbs).

Step 14: Restore power and prime the fuel system

• Reinstall the fuel pump fuse/relay using a flat trim tool.
• Reconnect the battery negative terminal using a 10mm socket.
• Turn the key to ON (engine off) for 5 seconds, then OFF for 5 seconds—repeat 3 times to prime the system.

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✅ After Repair

• Start the engine and let it idle for 1–2 minutes.
• Check underneath for leaks at the fuel line connections and around the tank.
• Test drive gently, then recheck for leaks and fuel smell.
• If you have a check-engine light after the repair, check connectors and fuel line seating first.

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💰 DIY vs Shop Cost

Shop Cost: $900-$1,800 (parts + labor)

DIY Cost: $250-$650 (parts only)

You Save: $650-$1,150 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-6 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.