🔧 Wrangler - Fuel Pump Module Replacement

On your Wrangler, the fuel pump is part of a pump module that sits inside the fuel tank (it also includes the fuel level sender). Replacing it requires lowering the fuel tank so you can remove the locking ring and swap the module safely.

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

Assumption: stock tank/skid setup; torque values listed are best-effort.

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⚠️ Safety & Precautions

• 🧯 Work outside or in a very well-ventilated area; fuel vapors are flammable.
• 🔥 No smoking, no sparks, no shop lights with hot bulbs near the tank.
• 🔋 Disconnect the negative battery cable before disconnecting fuel lines or the pump wiring.
• 🛞 Support the Wrangler with jack stands on the frame; never rely on a floor jack alone.
• ⛽ Keep the fuel level as low as possible; a full tank is very heavy.
• 👓 Wear safety glasses and gloves; fuel can irritate skin and eyes.

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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-18mm
• Ratchet
• Long extension set
• Torque wrench (10-150 ft-lbs)
• Flat-blade screwdriver
• Fuel line quick-disconnect tool set (specialty)
• Brass punch (specialty)
• Dead-blow hammer
• Drain pan
• Hand siphon pump (specialty)
• Shop towels
• Paint marker

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel pump module assembly (with fuel level sender) - Qty: 1
• Fuel pump module tank seal (O-ring) - Qty: 1
• Fuel pump module lock ring - Qty: 1 (recommended)
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground, put the transmission in 1st gear, and chock the wheels.
• Run the tank close to empty if possible.
• Relieve fuel pressure before opening any fuel line.
• Disconnect the negative battery cable using a socket (usually 10mm).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve fuel system pressure

• Open the hood and remove the fuel pump relay from the under-hood fuse/relay box (TIPM). Use the relay diagram on the cover.
• Start the engine and let it run until it stalls. Crank for 2-3 seconds more to bleed off remaining pressure.
• Turn the key off and reinstall the relay later during reassembly.

Step 2: Disconnect the battery

• Use a 10mm socket and ratchet to remove the negative battery cable and tuck it aside so it cannot spring back.

Step 3: Safely raise and support the Wrangler

• Use a floor jack (rated 3-ton minimum) to lift the rear.
• Place jack stands (rated 3-ton minimum) under the frame and lower onto the stands.
• Keep the floor jack nearby for support as needed.

Step 4: Drain/empty the tank as much as possible

• Use a hand siphon pump (specialty) to remove as much fuel as you can into approved fuel containers.
• Wipe spills immediately with shop towels.

Step 5: Support the fuel tank

• Position a transmission jack (specialty) under the center of the fuel tank/skid area.
• Add a piece of wood (if you have it) between the jack pad and skid to spread the load; keep the tank stable.

Step 6: Remove the fuel tank skid plate/straps hardware

• Use a socket set 13mm-18mm, ratchet, and long extensions to remove the skid/strap bolts.
• Lower bolts evenly while the transmission jack supports the weight.
• During reassembly: Torque tank strap/skid fasteners to 40 Nm (30 ft-lbs).

Step 7: Disconnect filler and vent hoses

• At the filler neck area, loosen hose clamps using a flat-blade screwdriver.
• Twist hoses gently to break them loose, then pull them off.
• Tip: mark hose positions with a paint marker.

Step 8: Disconnect electrical connector and fuel line

• Unplug the fuel pump module electrical connector at the top/front of the tank.
• Disconnect the fuel supply quick-connect fitting using a fuel line quick-disconnect tool set (specialty).
• Catch any drips in a drain pan and wipe with shop towels.

Step 9: Lower and remove the fuel tank

• Slowly lower the tank using the transmission jack (specialty).
• Watch for any remaining hoses/wiring that may still be attached; stop and disconnect as needed.
• Once clear, slide the tank out from under the Wrangler.

Step 10: Remove the fuel pump module lock ring

• Clean dirt around the pump module opening using shop towels so nothing falls into the tank.
• Use a paint marker to mark the module orientation to the tank.
• Use a brass punch (specialty) and dead-blow hammer to tap the lock ring counterclockwise until it releases.
• Tip: brass reduces spark risk.

Step 11: Remove the old module and seal

• Lift the module straight up carefully (the fuel level float arm is delicate).
• Angle it as needed to clear the opening without bending the float arm.
• Remove the old tank seal (O-ring) and discard it.

Step 12: Install the new seal and fuel pump module

• Install the new fuel pump module tank seal (O-ring) onto the tank opening.
• Apply a very light film of clean fuel to the seal to help it seat (no heavy grease).
• Lower the new module in, aligning your paint marks and the locating tabs.
• Apply a small amount of dielectric grease to the electrical connector seal.

Step 13: Reinstall and tighten the lock ring

• Install the lock ring and tap it clockwise using the brass punch (specialty) and dead-blow hammer until fully seated against the stops.
• Make sure the module flange is evenly seated all the way around (no pinched seal).

Step 14: Reinstall the tank

• Raise the tank into position using the transmission jack (specialty).
• Reconnect the electrical connector and fuel line until they click/lock.
• Reconnect filler and vent hoses and tighten clamps using a flat-blade screwdriver.
• Reinstall skid/strap bolts using a socket set and ratchet.
• Torque tank strap/skid fasteners to 40 Nm (30 ft-lbs) using a torque wrench.

Step 15: Restore power and prime the system

• Reinstall the fuel pump relay in the TIPM.
• Reconnect the negative battery cable using a 10mm socket and ratchet.
• Turn the key to ON (do not start) for 3 seconds, then OFF. Repeat 3 times to prime fuel pressure.

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✅ After Repair

• Start the engine and let it idle while you inspect underneath for leaks at the quick-connect, module seal area, and filler hoses.
• If the engine cranks longer than normal, cycle the key ON/OFF a few more times to finish priming.
• Test drive 5-10 minutes, then recheck for leaks.
• If a check-engine light appears, scan for codes (a loose connector or evap hose is common after tank work).

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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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🎯 Ready to get started?

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