1999 Lincoln Town Car Fuel Pump Replacement: A Complete Guide for DIY Owners

If your 1999 Lincoln Town Car cranks but won't start, or if it sputters and loses power on the highway, the fuel pump is likely the culprit. The fuel pump on your Town Car is a critical component that delivers pressurized fuel from the tank to the engine. When it fails, the car simply won't run. The good news is that replacing the fuel pump on a 1999 Lincoln Town Car is a manageable job for a moderately experienced DIY mechanic, provided you have the right tools, parts, and patience. This guide will walk you through everything you need to know, from diagnosing a bad pump to the step-by-step replacement process, and help you choose the best replacement part.

How to Know Your Fuel Pump Is Failing

Before you start tearing apart the interior, you need to confirm that the fuel pump is the problem. The symptoms of a failing fuel pump in a 1999 Lincoln Town Car are often quite clear. Here are the most common signs:

1. Engine Cranks but Won't Start. This is the most obvious symptom. When you turn the key to the "ON" position, you should hear a faint whirring sound from the rear of the car for about two seconds. That is the fuel pump priming the system. If you don't hear that sound, the pump is likely dead .

2. Sputtering or Loss of Power Under Load. A failing pump may struggle to maintain consistent fuel pressure. You might notice the car sputtering, hesitating, or losing power, especially when accelerating onto a highway or climbing a hill. This happens because the engine demands more fuel under load, but the pump cannot deliver it .

3. Difficulty Starting After a Long Drive. If the car starts fine when cold but struggles to start after it has been driven and is hot (a condition known as "heat soak"), the fuel pump's internal components may be failing due to heat.

4. Low Fuel Pressure. The most definitive diagnostic step is to check the fuel pressure. You can rent a fuel pressure gauge from most auto parts stores. Connect it to the Schrader valve on the fuel rail (located near the engine's intake manifold). For a 1999 Lincoln Town Car, the static fuel pressure should be around 35-45 psi with the engine running. If the pressure is significantly lower, the pump is weak or failing.

Two Fuse Locations You Must Check First

Before you assume the pump itself is bad, you should always check the fuses and relays. Replacing a blown fuse is much cheaper than a new pump. The 1999 Lincoln Town Car has two fuel pump fuses in different locations :

1. Fuse in the Engine Compartment (Power Distribution Box). This is the main fuse. Open the hood and locate the power distribution box on the driver's side. It is a black plastic box with a removable cover. Inside, find mini fuse #14. This is a 20 amp fuse that protects the fuel pump circuit. Pull it out and inspect the metal strip inside. If it is broken, replace it with a new 20 amp fuse .

2. Fuse in the Trunk. There is a second fuse box located in the trunk. Open the trunk and look on the left side panel. You will find a fuse panel. Inside, look for fuse #21. This is a 15 amp fuse that also protects the fuel pump system. Check this one as well .

Also check the Fuel Pump Relay. In the engine compartment fuse box, you will find the fuel pump relay. It is typically labeled as Relay R1 . You can swap it with another relay of the same type (like the horn relay) to test if it is the problem. If the car starts after swapping, the relay is bad.

Where the Fuel Pump Is Located

The fuel pump on a 1999 Lincoln Town Car is located inside the fuel tank. This is typical for modern fuel-injected vehicles. Accessing the fuel pump requires either removing the fuel tank from the vehicle or cutting an access hole in the trunk floor. The most common and recommended method for the Town Car is to remove the fuel tank. However, many owners opt for the "access hole" method to save time, though it requires careful cutting and sealing.

The fuel tank is located under the rear of the car, behind the rear axle.

Step-by-Step Fuel Pump Replacement (Tank Removal Method)

This procedure assumes you will drop the fuel tank. Safety is paramount. You will be working with gasoline and fuel vapors. Work in a well-ventilated area, away from any open flames or sparks. Disconnect the negative battery terminal before starting.

1. Relieve Fuel System Pressure. Locate the fuel pump relay in the engine compartment fuse box. Remove the relay. Then, start the engine. It will run for a few seconds and then stall. This relieves the pressure in the fuel lines. Turn the ignition off and reinstall the relay.

2. Disconnect the Battery. Disconnect the negative (black) terminal from the battery.

3. Jack Up the Rear of the Car. Safely lift the rear of the car using a floor jack and secure it on jack stands. Ensure the car is stable.

4. Remove the Fuel Filler Neck. There is a rubber hose that connects the fuel filler neck to the top of the tank. Loosen the hose clamp and slide the hose off the tank's filler neck tube.

5. Support the Fuel Tank. With a floor jack, place a piece of wood (like a 2x4) on the jack saddle and carefully position it under the center of the fuel tank. Raise the jack just enough to support the weight of the tank.

6. Remove the Fuel Tank Straps. There are two metal straps that hold the tank in place. You will find bolts at the front of these straps. Use a socket and ratchet to remove the bolts. The straps will be loose.

7. Lower the Tank Slightly. Carefully lower the jack just a few inches. This gives you access to the top of the tank. You will see the fuel pump module assembly (a large plastic ring) and the electrical connector and fuel lines.

8. Disconnect the Fuel Lines and Electrical Connector. At the top of the pump module, you will see two fuel lines: a supply line and a return line. They are likely held on by quick-connect fittings. Carefully press the release tabs and pull the lines off. Be prepared for a small amount of fuel spillage. Also, disconnect the electrical connector that powers the pump.

9. Remove the Fuel Pump Module. Now, lower the tank completely. With the tank on the ground, you can see the large retaining ring (usually a plastic or metal lock ring) that holds the pump module in the tank. Use a flathead screwdriver and a hammer to gently tap the ring counterclockwise to loosen it. Once loose, lift the entire pump module assembly out of the tank.

10. Replace the Pump. The pump module is an assembly. The actual fuel pump is a small cylindrical unit attached to the side of the module. You can either buy a complete module (which includes the pump, strainer, and sending unit) or just the pump itself. For a DIY job, a complete module is often easier. Install the new pump module into the tank, aligning the tab on the bottom of the module with the notch in the tank. Press down firmly and install the retaining ring. Tap it clockwise to lock it in place.

11. Reinstall the Tank. Reverse the removal steps. Lift the tank back into place, reconnect the fuel lines and electrical connector, install the fuel tank straps, and reconnect the fuel filler neck. Tighten the bolts securely.

12. Reconnect the Battery. Reconnect the negative battery terminal.

13. Prime the System. Turn the key to the "ON" position (without starting the engine) for about 5 seconds. Turn it off, then back on again. This cycles the pump to prime the system. Check for any fuel leaks around the connections.

14. Start the Engine. Start the engine and let it idle. Check for leaks again. Take the car for a short test drive to ensure the pump is working correctly.

Important Safety Considerations

Working on a fuel system is inherently dangerous. Here are a few critical safety tips:

  • No Smoking or Open Flames. Gasoline vapors are highly flammable. Do not smoke or have any open flames (like a pilot light) nearby.
  • Work in a Well-Ventilated Area. Gas fumes are toxic. Work outside or with a garage door open.
  • Have a Fire Extinguisher Nearby. A small Class B fire extinguisher is a wise investment.
  • Disconnect the Battery. This prevents any electrical sparks that could ignite fumes.
  • Use the Correct Tools. Using a hammer and screwdriver on the locking ring is common, but be careful not to damage the tank. A dedicated fuel pump lock ring tool is much safer and easier to use.

Common Mistakes to Avoid

Even experienced DIYers can make mistakes. Here are the most common pitfalls when replacing a fuel pump on a 1999 Lincoln Town Car:

  • Forgetting to Check the Fuses and Relay First. This is the number one mistake. A blown fuse or a bad relay is a much cheaper and easier fix.
  • Not Replacing the Fuel Filter. The fuel pump strainer is a coarse filter. The main fuel filter is located on the frame rail. When you replace the pump, it is highly recommended to replace the fuel filter as well. A clogged filter can strain a new pump and cause it to fail prematurely.
  • Dirty Work Area. If you drop any dirt or debris into the fuel tank while the pump module is out, that debris will be sucked into the new pump and can damage it immediately. Clean the area around the pump module thoroughly before removing it.
  • Over-tightening the Retaining Ring. The locking ring does not need to be extremely tight. Just snug enough to prevent leaks. Over-tightening can crack the plastic ring or the tank.
  • Using the Wrong Fuel Pump. The 1999 Lincoln Town Car requires a specific pump. Using a universal pump can lead to incorrect fuel pressure, poor performance, and a short lifespan. Always use a vehicle-specific replacement.

Which Fuel Pump Should You Buy?

When choosing a replacement fuel pump for your 1999 Lincoln Town Car, you have two main options: a complete pump module assembly or just the pump itself. A complete module is generally easier to install and includes a new fuel level sending unit, which is a common failure point on older Town Cars. You want a pump that is an OEM replacement or better. A high-quality pump will provide consistent fuel pressure, quiet operation, and long-term reliability.

We strongly recommend the KEMSO brand for your 1999 Lincoln Town Car fuel pump replacement. KEMSO is a leading aftermarket fuel pump manufacturer that produces high-performance, OEM replacement pumps. Their pumps are designed to meet or exceed the original factory specifications, ensuring a perfect fit and reliable performance. Every KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind that your investment is protected. Whether you are looking for a direct replacement or a high-flow performance upgrade, KEMSO has a solution that will keep your Town Car running smoothly for years to come.

To find the perfect KEMSO fuel pump for your 1999 Lincoln Town Car, visit their official website today: https://www.kemsoracing.com/

A Quick Note on the Fuel Pump Relay and Fuse Diagram

If you are still troubleshooting, here is a quick reference for the location of the fuel pump fuse and relay. As mentioned earlier, the engine compartment fuse box is the main area to check.

  • Fuel Pump Fuse: Mini fuse #14, 20 amp, located in the engine compartment power distribution box .
  • Fuel Pump Relay: Relay R1, located in the same engine compartment fuse box .
  • Second Fuel Pump Fuse: Fuse #21, 15 amp, located in the fuse box in the trunk .

These are the most common electrical components to fail, and checking them is your first step.

Final Thoughts

Replacing the fuel pump on a 1999 Lincoln Town Car is a significant job, but it is well within the capability of a dedicated DIY mechanic. The key to success is thorough diagnosis, careful preparation, and using the right parts. Do not skip the preliminary checks of the fuses and relay. If you confirm the pump is bad, follow the tank removal procedure step by step, and take your time. The most important part is choosing a quality replacement pump. A cheap, no-name pump will likely fail again, leaving you stranded. Investing in a high-quality, lifetime-warranted pump like those from KEMSO is the smartest decision you can make for your car.

For the best selection of high-performance, OEM replacement fuel pumps backed by a lifetime warranty, visit KEMSO at https://www.kemsoracing.com/


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