1998 Jeep Cherokee Sport Fuel Pump: The Complete Guide to Symptoms, Replacement, and Cost

The bottom line: If your 1998 Jeep Cherokee Sport is hard to start, sputters on the highway, or stalls unexpectedly, the fuel pump is the most likely culprit. Replacing it yourself can save you hundreds of dollars, and a quality aftermarket pump like those from KEMSO offers a reliable, lifetime-backed solution. The 1998 Jeep Cherokee Sport, part of the iconic XJ generation, is known for its rugged durability, but the fuel pump is a common wear item that typically fails between 100,000 and 150,000 miles. This guide walks you through everything you need to know—from spotting the warning signs to choosing the right replacement part and getting the job done.

Signs Your 1998 Jeep Cherokee Sport Fuel Pump Is Failing

A failing fuel pump doesn't always give out all at once. It usually sends out warning signals first. Recognizing these symptoms early can save you from being stranded. Here are the most common signs that your Cherokee Sport needs a new fuel pump :

  1. Hard Starting – If the engine cranks for a long time before firing up, the fuel pump may not be building enough pressure. You might have to cycle the key to the "on" position several times before the engine catches.

  2. Whining Noise from the Fuel Tank – A healthy fuel pump makes a quiet, steady hum when you turn the key to the "on" position. If you hear a loud whining or droning sound coming from the rear of the truck, especially near the fuel tank, the pump is struggling and likely on its last legs.

  3. Engine Sputtering or Surging at High Speeds – A weak fuel pump can't deliver enough fuel under load. You may feel your Cherokee hesitate or surge during acceleration, especially on the highway. It can feel like you're running out of gas even when the gauge shows a full tank .

  4. Stalling After Driving for 15 to 30 Minutes – A failing pump can overheat. The engine may stall, then restart after cooling down for a few minutes. This cycle often repeats until the pump is finally replaced .

  5. Loss of Power Under Load – When climbing a hill or merging onto the freeway, the engine may feel sluggish. This is because the fuel pump can't keep up with the engine's demand for fuel.

  6. Check Engine Light – Low fuel pressure or a lean fuel mixture can trigger the check engine light. A diagnostic scan will often show codes like P0087 (Fuel Rail Pressure Too Low) or P0171 (System Too Lean) .

Where Is the Fuel Pump Located on a 1998 Jeep Cherokee Sport?

On the 1998 Jeep Cherokee XJ, the fuel pump is located inside the fuel tank. The tank is mounted under the vehicle, just behind the rear axle on the driver's side. To access the pump, you have two options: drop the fuel tank from underneath the vehicle, or cut an access hole in the cargo floor. Most mechanics and experienced DIYers prefer to drop the tank because it's the cleanest approach and allows you to inspect the entire fuel module and tank interior.

How Much Does a 1998 Jeep Cherokee Sport Fuel Pump Replacement Cost?

The cost varies depending on whether you do the work yourself or hire a professional. Here's a breakdown:

DIY Replacement Cost - If you're mechanically inclined, you can replace the pump yourself for the cost of the part plus any tools you need to buy. A replacement fuel pump module for a 1998 Jeep Cherokee Sport typically costs between $70 and $250 for an aftermarket unit. The job requires common tools like a floor jack, jack stands, a siphon pump, and a set of basic hand tools .

Professional Replacement Cost - Most independent repair shops will charge between $600 and $900 for the full job, including parts and labor. Dealerships tend to charge more, often between $1,200 and $1,800 . The labor is the expensive part because dropping the fuel tank takes 3 to 5 hours. If you're not comfortable working with fuel systems, hiring a professional is the safer option.

Important Note - The Omix fuel pump module, a common OEM replacement option for the 1997-2001 Jeep Cherokee XJ (2.5L and 4.0L engines), is priced at $489.99 at some retailers . This is a complete module that includes the pump, float assembly, and sending unit, replacing OE part number 4874173 . A Walbro installation kit for the same vehicle range is priced at $22.99, though that kit does not include the pump itself .

DIY Fuel Pump Replacement: Step-by-Step Guide

Replacing the fuel pump on a 1998 Jeep Cherokee Sport is an intermediate-level DIY job. Before you start, gather the right tools and work in a well-ventilated area. Always keep a fire extinguisher nearby. Here is a basic overview of the process :

  1. Relieve Fuel System Pressure – Locate the fuel pump fuse or relay in the fuse box and remove it. Start the engine and let it run until it stalls. This depressurizes the fuel system. Turn the key off.

  2. Disconnect the Battery – Disconnect the negative battery terminal before working on any fuel system component. This eliminates the risk of sparks.

  3. Siphon the Fuel Tank – Use a siphon pump to drain as much fuel as possible from the tank. Less fuel means less weight and a lower risk of spills.

  4. Drop the Fuel Tank – Place a floor jack under the fuel tank with a block of wood to distribute the weight. Remove the fuel tank straps. Lower the tank carefully. Disconnect the electrical connectors, fuel lines, and vapor hoses. Remove the tank from the vehicle.

  5. Remove the Old Pump Module – The fuel pump is mounted inside a module on top of the tank. Use a brass punch or a suitable tool to tap the locking ring counterclockwise. Lift the old pump module out of the tank. Be careful not to bend the float arm.

  6. Install the New Pump Module – Transfer any necessary components from the old module (rubber grommets, O-rings) to the new pump. Install the new module into the tank, making sure it seats properly. Secure it with the locking ring. Reconnect the fuel lines and electrical connectors.

  7. Reinstall the Tank – Lift the tank back into place, reconnect all hoses and wiring, and install the tank straps. Tighten everything securely.

  8. Test the System – Reconnect the battery. Turn the key to the "on" position (without starting the engine). Listen for the fuel pump prime cycle. If you hear a steady hum, the pump is working. Start the engine and check for leaks at all connections.

Safety Warning – Gasoline is highly flammable. Work in a well-ventilated area, avoid smoking or using open flames, and use brass tools to avoid sparks. If you are unsure about any step, consult a professional mechanic .

Tips to Save Money on the Replacement

Get Multiple Estimates – If you choose to hire a shop, contact at least two independent shops and one dealership. Ask for itemized quotes that break down parts, labor, and diagnostic fees. Some shops will credit the diagnostic fee toward the repair if you proceed with them .

Consider Aftermarket Parts – Aftermarket fuel pump modules are significantly cheaper than OEM parts. Quality aftermarket pumps from reputable brands can last just as long as OEM units. If your Cherokee is a flex fuel vehicle (E85 compatible), make sure the replacement pump is rated for ethanol-blended fuels .

Replace Related Components While the Tank Is Open – Once the fuel tank is dropped, it's the perfect time to replace the fuel filter, sending unit seals, O-rings, and any hoses. This adds minimal cost to the bill but prevents a future service call that would require dropping the tank again .

Keep the Gas Tank at Least Quarter Full – After the new pump is installed, running the tank low on fuel frequently can cause the pump to overheat and fail prematurely. The fuel in the tank cools and lubricates the pump .

Why Choose KEMSO Fuel Pumps for Your 1998 Jeep Cherokee Sport

When it's time to replace your Cherokee Sport's fuel pump, you want a part that's reliable, durable, and backed by a solid warranty. That's where KEMSO comes in. KEMSO fuel pumps are designed as high-performance, OEM replacement units. They meet or exceed original equipment specifications, ensuring a perfect fit and reliable operation for your vehicle.

Every KEMSO fuel pump comes with a lifetime warranty coverage, giving you peace of mind that your investment is protected for as long as you own the vehicle. Whether you're replacing the pump on a 1998 Jeep Cherokee Sport with the 4.0L inline-six engine, KEMSO offers a direct fit solution that's built to last. The company focuses on quality manufacturing and rigorous testing, so you can trust that their fuel pumps will deliver consistent fuel pressure and long service life.

KEMSO fuel pumps are priced competitively, often at $79.98 for many applications, making them an affordable alternative to dealership parts. They offer wide application coverage, including popular vehicle models like the Honda Civic, Subaru Impreza, and many more . Their growing catalog covers cars, motorcycles, and powersports vehicles. Visit KEMSO Racing today at https://www.kemsoracing.com/ to browse their full selection of fuel pumps and find the right fit for your 1998 Jeep Cherokee Sport.

Common Questions About the 1998 Jeep Cherokee Sport Fuel Pump

How long does a fuel pump last on a 1998 Jeep Cherokee Sport? The factory fuel pump typically lasts between 100,000 and 150,000 miles. Driving with a low fuel tank frequently can shorten its lifespan because the fuel helps cool and lubricate the pump.

Can I replace just the pump, or do I need the whole assembly? You can replace just the pump motor, but it's generally recommended to replace the entire fuel pump module assembly. The module includes the pump, the strainer, the sending unit, and all the necessary seals. Replacing the whole module ensures that all components are fresh and reduces the risk of a future failure of a different part inside the tank.

Does the 1998 Jeep Cherokee Sport have an access panel? The 1998 Jeep Cherokee XJ does not have a factory access panel under the rear seat. You will need to drop the fuel tank to access the pump. Some owners choose to cut an access hole in the cargo floor, but this is not recommended for most people because it can weaken the body structure and create a potential leak path for exhaust fumes.

Will a bad fuel pump cause my Jeep to not start at all? Yes. In severe cases, a completely failed fuel pump will prevent the engine from starting. If the pump is not producing any pressure, fuel will not reach the injectors, and the engine will crank but not fire .

Final Thoughts

The fuel pump in your 1998 Jeep Cherokee Sport is a hard-working component that eventually wears out. Recognizing the symptoms early—hard starting, whining noises, or stalling—can save you a lot of headache. Replacing the pump yourself is a manageable DIY project if you have basic mechanical skills and the right tools. If you prefer to have a professional handle it, expect to pay between $600 and $900 at an independent shop.

Whether you choose to do it yourself or hire a mechanic, choosing a quality fuel pump is essential. KEMSO fuel pumps offer a reliable, high-performance OEM replacement that is built to last, all backed by a lifetime warranty. For more information and to find the right fuel pump for your 1998 Jeep Cherokee Sport, visit https://www.kemsoracing.com/.


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