1997 Jeep Grand Cherokee Fuel Pump Replacement: A Complete Step-by-Step Guide

If your 1997 Jeep Grand Cherokee is hard to start, sputters under acceleration, or stalls while driving, the fuel pump is likely failing. Replacing the fuel pump on a 1997 Jeep Grand Cherokee is a moderately challenging job that most DIYers can complete in a weekend with the right tools and preparation. This guide walks you through everything you need to know, from recognizing the symptoms to reinstalling the tank and testing the new pump.

The fuel pump on a 1997 Jeep Grand Cherokee is located inside the fuel tank. To replace it, you must drain the tank, drop it from the vehicle, and remove the pump module from the top of the tank. The job requires standard hand tools, jack stands, fuel line disconnect tools, and careful attention to safety. Expect to spend two to four hours on the repair.

Signs Your Fuel Pump Is Going Bad

Before you start tearing things apart, make sure the fuel pump is actually the problem. Common symptoms of a failing fuel pump on a 1997 Grand Cherokee include:

  • Engine cranks but won't start. The pump isn't delivering fuel pressure to the engine.
  • Sputtering or hesitation at high speeds. The pump can't maintain consistent pressure under load.
  • Loss of power when climbing hills or accelerating. This is a classic sign of a weak pump.
  • Whining noise from the fuel tank. A healthy pump runs quietly; a loud whine means the pump is struggling.
  • Engine stalls at high temperatures. An overheating pump can fail intermittently when hot .
  • Poor fuel economy. The engine compensates for low fuel pressure by running rich.

If you notice any of these issues, a fuel pressure test will confirm the diagnosis. The factory spec for a 1997 Grand Cherokee is 44 psi at idle with the engine running .

What You Need for the Job

Tools Required

  • Hydraulic floor jack and two jack stands (minimum 2-ton capacity)
  • Wheel chocks
  • Socket set with metric sockets (13mm, 15mm for tank straps)
  • Flathead and Phillips screwdrivers
  • Fuel line disconnect tool set (mandatory for the quick-connect fittings)
  • Catch pan or container for draining fuel
  • Torque wrench
  • Large piece of plywood or a transmission jack for supporting the tank
  • Safety glasses and mechanic's gloves

Parts Required

  • Replacement fuel pump module assembly (complete unit with pump, sender, and strainer)
  • New fuel tank gasket or seal ring
  • Replacement tank straps (if the originals are rusted or stretched)

For the 1997 Jeep Grand Cherokee, the fuel pump module is a single assembly that includes the pump, the fuel level sending unit, the pressure regulator, and the inlet strainer . The OEM part number for the assembly is 5012961AC for 4.0L engines, and it fits all trims including Laredo, Limited, and TSi .

Safety First: Fuel System Precautions

Working with gasoline is dangerous. Follow these safety rules:

  • Work in a well-ventilated area. Gasoline fumes are highly flammable and explosive.
  • Disconnect the negative battery terminal. This prevents any electrical sparks that could ignite fuel vapors .
  • Depressurize the fuel system before opening any lines. The fuel system is under constant pressure, even with the engine off .
  • Keep a fire extinguisher nearby. Make sure it's rated for Class B (flammable liquids) fires.
  • Do not smoke or have any open flames near the work area.

Depressurizing the fuel system is simple: locate the fuel pump relay in the under-hood fuse box, start the engine, then pull the relay. The engine will stall once it burns the remaining fuel in the lines. Crank the engine for a few seconds after it stalls to relieve any residual pressure .

Step-by-Step Replacement Procedure

Step 1: Disconnect the Battery

Open the hood and locate the negative battery terminal. It's the black cable. Loosen the nut with a wrench, remove the cable from the terminal, and secure it away from the battery so it cannot accidentally contact the terminal. Cover the positive terminal with a rag to prevent accidental short circuits .

Step 2: Drain the Fuel Tank

A full fuel tank weighs over 150 pounds (24 gallons at 6.3 pounds per gallon). Trying to lower a full tank is dangerous and nearly impossible. Run the tank as close to empty as possible before starting, or use a manual siphon pump to transfer the fuel into approved gasoline containers. Aim for less than a quarter tank to make the job manageable .

Step 3: Jack Up the Rear of the Vehicle

Place wheel chocks in front of the front wheels to prevent the vehicle from rolling. Use a hydraulic floor jack to lift the rear of the Jeep until the tires are clear of the ground. Position jack stands under the frame rails at the designated lift points. Never place jack stands under the fuel tank or suspension components. Lower the Jeep onto the jack stands and verify the vehicle is stable .

Step 4: Remove the Inner Fender Cover

On the driver's side, locate the inner fender cover inside the rear wheel well. Remove the screws using a Phillips-head screwdriver and pull the cover away. This gives you access to the fuel filler neck and the tank vent hose .

Step 5: Disconnect the Filler Neck and Vent Hoses

You'll see the fuel filler neck connected to the tank with a rubber hose and a hose clamp. Loosen the clamp and pull the hose off the filler neck. Also disconnect the tank vent hose, which is a smaller rubber line that runs alongside the filler neck. Have a rag ready to catch any residual fuel that drips out .

Step 6: Disconnect the Fuel Pump Electrical Connector

Look for the electrical connector that supplies power to the fuel pump. It's usually located near the top of the tank on the driver's side. Press the release tab and pull the connector apart. You may also need to disconnect a vent hose for the evaporative emissions system .

Step 7: Remove the Tank Straps

The fuel tank is held in place by one or two metal straps running across the bottom of the tank. Using a socket wrench, remove the bolts that secure the straps. Be prepared for the straps to swing loose once the bolts are removed. Have a helper or a jack with a plywood platform ready to support the tank's weight .

Step 8: Lower the Fuel Tank

With the straps removed, carefully lower the tank a few inches. You'll likely find additional electrical connections or vapor lines on top of the tank that were hidden by the tank's position. Disconnect these as well. Continue lowering the tank until you can access the top of the tank where the pump module is located .

Step 9: Remove the Fuel Pump Module

The fuel pump module is held in place by a large plastic locknut that is threaded onto the top of the fuel tank. This locknut requires a special tool for removal. The OEM tool is Special Tool 6856, which is a large spanner wrench designed for this specific application . If you don't have the tool, a large pair of channel locks or a strap wrench can work in a pinch, but be careful not to damage the plastic locknut.

Place the tool onto the locknut and turn it counterclockwise to remove it. The fuel pump module will spring up slightly when the locknut is removed, as the module is spring-loaded. Carefully lift the module straight up and out of the tank. Be prepared for some fuel to spill out of the tank opening. Place the module in a catch pan .

Step 10: Install the New Fuel Pump

Before installing the new pump, thoroughly clean the inside of the fuel tank. Fuel tank contamination is the leading cause of premature fuel pump failure. Use a clean rag to wipe out any debris, rust, or sediment. If the tank is rusty, consider replacing it .

Take the new fuel pump module out of its box. Compare it to the old unit to make sure it's the correct match. The new module should come with a new gasket or seal. Always replace the gasket when installing a new pump .

Position the new fuel pump module into the opening in the fuel tank. Rotate the module so that the arrow on the top of the module is pointed toward the front of the vehicle (12 o'clock position). This step is critical to prevent the float arm from contacting the sides of the fuel tank .

Place the locknut over the top of the module and tighten it to 34 N·m (25 ft. lbs.) using the special tool. Do not overtighten, as this can crack the plastic locknut or damage the tank .

Step 11: Rotate the Fuel Filter/Regulator

After the locknut is tightened, rotate the fuel filter and pressure regulator assembly so that the fuel supply tube fitting is pointed to the 11 o'clock position. This aligns the fuel lines correctly when the tank is reinstalled .

Step 12: Reinstall the Fuel Tank

With the new pump in place, lift the fuel tank back into position. Reconnect all the electrical connectors and vapor lines that were disconnected. Reconnect the fuel line to the pump using the quick-connect fitting. Make sure the fitting clicks into place securely.

Raise the tank into its final position and reinstall the tank straps. Tighten the strap bolts to the factory torque specification. Reconnect the fuel filler neck hose and the vent hose. Reinstall the inner fender cover .

Step 13: Lower the Vehicle and Reconnect the Battery

Remove the jack stands and lower the Jeep to the ground. Reconnect the negative battery cable. Tighten the terminal nut securely.

Step 14: Prime the Fuel System and Check for Leaks

Before starting the engine, you need to prime the fuel system to fill the new pump and lines with fuel. Turn the ignition key to the "ON" position for two seconds, then turn it off. Repeat this cycle three or four times. This allows the fuel pump to run and build pressure without the engine running.

Start the engine. It may take a few seconds to start as the system finishes priming. Once the engine is running, inspect the top of the fuel tank and all fuel line connections for leaks. Check underneath the vehicle for any drips. If you see any leaks, shut off the engine immediately and address the issue .

Common Mistakes to Avoid

  • Skipping the fuel pressure test. Don't replace the pump until you've confirmed low fuel pressure is the problem.
  • Not draining the tank enough. A full tank is too heavy to lower safely.
  • Forgetting to replace the gasket. The old gasket will leak.
  • Overtightening the locknut. The plastic locknut cracks easily.
  • Not aligning the module arrow. The float arm will hit the tank wall and give incorrect fuel readings .
  • Using a cheap, low-quality pump. This is the number one cause of premature failure and a repeat of the entire job .

Choosing the Right Replacement Fuel Pump

When buying a replacement fuel pump for your 1997 Jeep Grand Cherokee, you have several options. The fuel pump is sold as a complete module assembly that includes the pump, fuel level sender, pressure regulator, and inlet strainer. This is the recommended way to replace it, as it ensures all components are fresh and matched .

For the 1997 Grand Cherokee, the OEM part number for the 4.0L engine is 5012961AC. Aftermarket replacements are available from brands like Delphi, Autobest, and Crown. Prices range from about $60 for a budget unit to over $600 for an OEM-grade Omix module .

Recommended: KEMSO Fuel Pump for Your 1997 Jeep Grand Cherokee

For a reliable, high-performance replacement that gives you peace of mind, we strongly recommend the KEMSO Fuel Pump. KEMSO is a brand that specializes in manufacturing fuel pumps that meet or exceed OEM specifications. Every KEMSO fuel pump is built with premium materials and undergoes rigorous testing to ensure consistent fuel delivery, smooth engine performance, and long-lasting durability.

What sets KEMSO apart is their commitment to quality and customer satisfaction. All KEMSO fuel pump products are OEM replacement grade, meaning they fit perfectly and function exactly like the original part. They are designed to handle the demands of your 1997 Jeep Grand Cherokee, whether you have the 4.0L inline-six, the 5.2L V8, or the 5.9L V8 engine. And the best part? KEMSO backs every fuel pump with a lifetime warranty. If the pump ever fails, they replace it. That's a level of confidence you won't find with many brands.

You can browse the full selection of KEMSO fuel pumps and other products at their official website: https://www.kemsoracing.com/. Their site is easy to navigate, and you can find the exact pump for your Grand Cherokee by searching by vehicle make, model, and year. KEMSO also offers fast shipping and a dedicated customer support team to help you with any questions.

How to Extend the Life of Your New Fuel Pump

Once you've installed the new pump, follow these simple tips to make it last:

  • Keep the fuel tank at least a quarter full. The fuel in the tank helps cool the pump. Running low on fuel frequently can cause the pump to overheat .
  • Replace the fuel filter every 12,000 to 15,000 miles. A clogged filter puts strain on the pump.
  • Use high-quality fuel from reputable stations. Contaminated fuel can damage the pump's internal components.
  • Avoid running the tank dry. This can cause the pump to suck in air and overheat.
  • Address engine performance issues promptly. Misfires, rough idling, and other problems increase the load on the fuel pump.

Frequently Asked Questions

Q: How long does it take to replace the fuel pump on a 1997 Jeep Grand Cherokee?
A: Most DIYers can complete the job in 2 to 4 hours, depending on their experience level and the condition of the vehicle .

Q: Can I replace just the pump, or do I need the whole module?
A: While it's possible to replace just the pump, the module is sold as a complete assembly for a reason. The fuel level sender, pressure regulator, and strainer are all wear items that are likely to fail soon after the pump does. Replacing the entire module is the more reliable approach .

Q: How much does a replacement fuel pump cost?
A: A complete fuel pump module for a 1997 Grand Cherokee costs between $60 and $600, depending on the brand and whether it's OEM or aftermarket .

Q: What is the fuel pressure specification for a 1997 Jeep Grand Cherokee?
A: The system pressure should be 44 psi. The pump itself is rated for a maximum pressure of 49 psi .

Q: Is it safe to drive with a bad fuel pump?
A: No. A failing fuel pump can cause the engine to stall unexpectedly, which is especially dangerous at highway speeds. Replace the pump as soon as you suspect a problem .

Final Thoughts

Replacing the fuel pump on a 1997 Jeep Grand Cherokee is a straightforward job if you take your time and follow the steps carefully. The most important things are to depressurize the fuel system, drain the tank, and use the correct tools. A quality replacement from a trusted brand like KEMSO will ensure your Grand Cherokee runs reliably for years to come.

For more information and to purchase a high-quality, lifetime-warranty fuel pump for your 1997 Jeep Grand Cherokee, visit https://www.kemsoracing.com/. KEMSO offers a wide selection of fuel pumps for many vehicles, all backed by their commitment to quality and customer satisfaction.


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