🔧 Wrangler - Fuel Pump Module Replacement

On your Wrangler, the fuel pump is part of a complete in-tank “fuel pump module” (pump + level sender). Replacing it requires safely lowering the fuel tank, swapping the module and seal, then reinstalling everything without fuel leaks.

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

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⚠️ Safety & Precautions

• ⛽ Work outdoors or in a very well-ventilated area—fuel vapors are flammable.
• 🔥 No smoking, no heaters, no grinding/sparks near the Jeep.
• 🧯 Keep a class B fire extinguisher nearby.
• 🧤 Wear safety glasses and fuel-resistant gloves—fuel will drip from lines.
• 🧰 Support the fuel tank with a jack before removing straps/skid—don’t let it drop.
• 🔋 Disconnect the negative battery cable before unplugging fuel pump wiring.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum, pair)
• Wheel chocks (pair)
• Metric socket set 8mm–21mm
• 3/8" drive ratchet
• 1/2" drive ratchet
• 3/8" drive extension set
• 1/2" drive breaker bar
• Torque wrench (10–200 ft-lbs)
• Flat-blade screwdriver
• Fuel line quick-disconnect tool set (specialty)
• Brass drift punch (specialty)
• Dead-blow hammer
• Pliers
• Trim clip removal tool
• Drain pan (2+ gallon)
• Shop rags
• Safety glasses
• Nitrile gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel pump module assembly (in-tank) - Qty: 1
• Fuel pump module tank seal (O-ring) - Qty: 1
• Fuel line retaining clips (if equipped/needed) - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the front wheels.
• Drive until the tank is as close to empty as possible—this makes the tank much lighter.
• Plan to keep dirt out of the tank: clean the top of the tank and module area before opening it.
• Take photos of hose routing first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Depressurize the fuel system

• Open the hood.
• Use your owner’s manual (or the fuse box cover diagram) to locate the fuel pump fuse/relay in the TIPM (under-hood fuse box).
• Remove the fuel pump fuse/relay using a trim clip removal tool or pliers.
• Start the engine and let it run until it stalls, then crank for 3–5 seconds more to relieve residual pressure.
• Turn the key OFF.

Step 2: Disconnect the battery

• Use a 10mm socket and 3/8" drive ratchet to disconnect the negative (–) battery cable.

Step 3: Raise and support the rear of the Jeep

• Use a floor jack (rated 3-ton minimum) to lift at a safe rear lift point.
• Set the Jeep securely on jack stands (rated 3-ton minimum, pair).
• Keep the floor jack available to support the fuel tank.

Step 4: Support the fuel tank

• Place a floor jack (rated 3-ton minimum) under the fuel tank with a wide support (a piece of wood works well) to spread the load.
• Apply light upward pressure so the tank is supported but not lifted.

Step 5: Remove the fuel tank skid plate (if equipped) and loosen/remove tank straps

• Use a metric socket set 8mm–21mm, 1/2" drive ratchet, and breaker bar to remove the skid plate fasteners and/or tank strap fasteners (sizes vary by hardware and corrosion).
• If bolts are stubborn, use controlled force with a breaker bar; avoid rounding the heads.
• As the last fasteners come out, keep the tank supported with the floor jack.
• If factory skid/strap hardware: Torque to 61 Nm (45 ft-lbs) for skid plate fasteners and Torque to 40 Nm (30 ft-lbs) for tank strap fasteners during reassembly.
• If aftermarket skid/straps: torque to the aftermarket manufacturer’s spec.

Step 6: Lower the tank slightly to access lines and wiring

• Slowly lower the floor jack just enough to reach the top/front of the tank.
• Do not pull the tank down aggressively—hoses and wiring can tear.

Step 7: Disconnect electrical connector(s) on the pump module

• Use a flat-blade screwdriver to gently release the connector lock (if needed), then unplug the fuel pump module electrical connector.

Step 8: Disconnect EVAP and fuel lines

• Place a drain pan (2+ gallon) under the connection points and have shop rags ready.
• Use a fuel line quick-disconnect tool set (specialty) to release the fuel line(s) at the module/tank connections.
• Disconnect EVAP/vapor hoses by releasing the tabs with pliers or a flat-blade screwdriver, depending on the clamp style.
• Label hoses before removal.

Step 9: Lower and remove the fuel tank

• Lower the floor jack slowly and guide the tank out from under the Jeep.
• Keep the tank as level as possible to avoid spilling fuel from vent openings.

Step 10: Clean the top of the tank and remove the pump module lock ring

• Use shop rags to thoroughly clean dirt from the top of the tank around the module.
• Use a brass drift punch (specialty) and dead-blow hammer to rotate the lock ring counterclockwise (brass reduces spark risk).
• Lift off the lock ring and remove the module.
• Be careful: the level float arm can snag—tilt the module as you lift it out.

Step 11: Replace the seal and install the new fuel pump module

• Remove the old seal and install the new fuel pump module tank seal (O-ring). Make sure it sits flat and is not twisted.
• Insert the new module carefully, guiding the float arm into the tank without bending it.
• Reinstall the lock ring and tighten it fully.
• Lock ring: Torque to 55 Nm (41 ft-lbs) (if using a tool that allows torqueing); otherwise tighten to the factory “fully seated” position with the brass drift punch (specialty) and dead-blow hammer until it stops and aligns correctly.

Step 12: Reinstall the fuel tank

• Position the tank on the floor jack (rated 3-ton minimum) and raise it enough to reconnect lines and wiring.
• Reconnect electrical connector(s) until they click.
• Reconnect fuel and EVAP lines using the fuel line quick-disconnect tool set (specialty) as needed, then tug lightly to confirm they are locked.
• Raise the tank fully into position, then reinstall straps/skid using the metric socket set 8mm–21mm, ratchets, and extensions.
• If factory skid/strap hardware: Torque to 61 Nm (45 ft-lbs) for skid plate fasteners and Torque to 40 Nm (30 ft-lbs) for tank strap fasteners.

Step 13: Restore power and prime the system

• Reinstall the fuel pump fuse/relay.
• Reconnect the negative battery cable using a 10mm socket and 3/8" drive ratchet.
• Turn key to ON (do not start) for 3 seconds, then OFF for 10 seconds. Repeat 3–4 times to prime the system.
• Start the engine and let it idle.

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✅ After Repair

• With the engine idling, inspect under the Jeep for any fuel drips or wet fuel lines.
• Shut the engine off and re-check the module area (top of tank) connections for seepage.
• Test drive briefly, then re-check for leaks again.
• If a check engine light appears (often EVAP-related), re-check hose connections; a scan tool can confirm stored codes.

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💰 DIY vs Shop Cost

Shop Cost: $900-$1,600 (parts + labor)

DIY Cost: $250-$700 (parts only)

You Save: $650-$900 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-5 hours.

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