Jaguar Fuel Pump: When To Replace And Why

Fuel pumps are essential for improving a vehicle's performance. However, they can malfunction due to various reasons, such as a faulty fuel pump seal, a loose plastic retaining ring, or a faulty fuel pump driver module. When this happens, it is important to consult a professional for help. This is because attempting to run your car with a faulty pump can cause huge internal damage. This article will discuss when to replace the fuel pump on a Jaguar.

Troubleshooting a fuel pump data error on a Jaguar X Type

Next, look for raw fuel data on the message centre, such as 'F1' or 'Fuel 1' and 'F2' or 'Fuel 2'. These are the sender units that will indicate a number. Check if the numbers on both the sender units are around 230 when full and 60 when empty. If not, the pumps may need to be replaced.

If you are having trouble getting power to your Jaguar fuel pump, or are experiencing error messages, it is recommended to consult a professional for a quick solution.

When to replace the fuel pump on a 2004 Jaguar XJ8

The fuel pump is responsible for delivering gas from the fuel tank to the fuel injectors. A failing fuel pump will not create enough pressure in the fuel system, possibly causing a loss of engine power or preventing the car from starting. It may also cause the check engine light to come on.

Fuel pumps do not have a specific replacement interval. However, repeatedly running the fuel tank low or driving with clogged fuel filters can shorten its lifespan. If you are experiencing any of the following issues, it may be time to replace your 2004 Jaguar XJ8's fuel pump:

• Fuel pump leaks
• Unusual noises coming from the fuel pump
• Loss of engine power
• Difficulty starting the car
• Check engine light is on

If you suspect that your fuel pump needs to be replaced, it is important to have it checked by a professional as soon as possible. Running your car with a faulty fuel pump can cause extensive internal damage.

• Unplug the battery ground cable and separate the fuel tank filler pipe cap.
• Reduce the pressure in the fuel system to drain the system.
• Take out the rear seat cushion to detach the scuff plate trim panel.
• Take out the floor covering and reposition it to remove the aperture floor cover.
• Separate the electrical connector module to the pump from the holding bracket and disconnect the electrical connector.
• Remove the locking ring and reposition the upper part of the pump. Make sure to detach this part before placing it back.
• Discard the gasket on the pump and remove the pump.
• Disconnect the fuel cross over lines.
• For installation, repeat the procedure in reverse.

Please note that working with the fuel system is dangerous, and it is recommended to let a repair shop handle this job unless you are very experienced in auto repair. Always take all necessary precautions to avoid the risk of fire.

How to identify a faulty fuel pump on a Jaguar

Fuel pumps are essential to improve the performance of your Jaguar vehicle. Keeping a regular tab on these components is highly recommended to avoid being stranded or stalled in traffic. If you face any issues with your Jaguar's fuel pump or notice anything strange, consult an expert as running your car with a faulty pump can cause huge internal damage. Here are some ways to identify a faulty fuel pump on a Jaguar:

Warning Lights and Error Messages

If you see a "Restricted Performance" indicator on your Jaguar's dashboard, it could be a sign of a faulty fuel pump. This may cause the car to go into limp mode and have reduced engine power. Additionally, error messages such as "Fuel Pump Fault" or "P2634 fuel pump circuit problem" may appear.

No-Start Condition

If your Jaguar's engine turns but doesn't fire up, it could be due to a faulty fuel pump. This may be accompanied by a silent fuel pump with no priming audible when you turn the key to position 1.

Unusual Engine Noise

A ticking noise coming from the engine block could indicate a worn high-pressure fuel pump. This noise may be mistaken for a top-end tick, such as valves or a supercharger.

Low Fuel Pressure

If your Jaguar is not getting enough fuel, it could be due to a faulty fuel pump. This can be confirmed by measuring the fuel pump pressure and comparing it to the required idle pressure for normal operation.

Fuel Leak

If you notice a fuel leak, it could be due to a damaged fuel pump seal or a loose plastic retaining ring. Locating and inspecting the seal and retaining ring can help identify the source of the leak.

Fuse and Relay Issues

Repeatedly blowing fuses or issues with the fuel pump relay could indicate a problem with the fuel pump itself. Checking the trunk fuse box, relay, and fuse, as well as measuring the voltage to the circuit, can help identify if the issue is with the fuel pump.

It is important to note that the fuel pump location and replacement procedure may vary depending on the model and year of your Jaguar. Consulting a professional or referring to model-specific repair manuals and forums is recommended for accurate information.

How to remove an X-Type fuel pump

To remove the fuel pump from a Jaguar X-Type, you will first need to identify the location of the pump. The pump is submerged in the fuel tank and can be accessed from under the rear seat on the RHS (right-hand side) of the car.

• Move the seat bases and backs as far forward as possible to maximise access.
• Disconnect the battery.
• Pull on the latches to remove the seat.
• Undo the seatbelt anchor to allow the complete removal of the seat base.
• Pull back the insulating material. There is no need to remove the trim around the door, but be careful not to drip fuel when removing the pump.
• Remove the black plastic cover. These can be stiff and difficult to remove, but levering them halfway out and then gently twisting can make it easier.
• Disconnect the electrical connector.
• Release the two pipes by simultaneously pressing in the two tabs and pulling the pipe from the connector. You may need to push down first to release, and you might have to press the release tabs multiple times.
• Remove the pump module locking ring using a tank cover removal tool or a small heavy hammer/mallet and a piece of soft wood. Place the wood against a long side rib and tap gently, only using as much force as required.
• Extract the pump module by first lifting the top plate and extending the piping to reach and release the locating clips.
• Carefully lift out the pump module, ensuring that the filter and level float do not get caught or damaged. Allow fuel to drip back into the tank, then lift the module into a petrol-resistant tray.
• Undo the electrical connector from the pump motor.
• Undo the three small screws from the top of the pump module housing.
• Lift out the damaged pump motor, ensuring that the small non-return valve stays in place in the housing inner cover. If it falls out, replace it with the round-hole end up.

Note: Some sources suggest cutting an access hole under the rear seat instead of removing the seat and tank. This method may be preferred to avoid the risk of sparks near the fuel tank.

To reinstall the fuel pump, simply follow the above steps in reverse.

Jaguar S-Type R fuel pump electrical part numbers

The fuel pump for a Jaguar S-Type R is located in the fuel tank, which can be accessed from under the rear seat on the RHS of the car. The pump is submerged in the fuel tank, so care should be taken to avoid dripping fuel when removing the pump unit.

There are a variety of fuel pumps compatible with the Jaguar S-Type, with prices starting from $107.99. Some of the brands available include Carquest Premium, Delphi, DENSO, Mr. Gasket, Bosch, and KAI.

When replacing the fuel pump, it is recommended to also replace the fuel filter and any seals or gaskets. Additionally, it is important to check the ground supply to the fuel pump and ensure that the electrical connectors are properly connected.

• Move the seat bases and backs as far forward as possible to maximize access.
• Disconnect the battery.
• Remove the rear seat by pulling on the latches and lifting the seat base.
• Undo the seat belt anchor.
• Pull back the insulating material.
• Remove the black plastic cover by carefully levering it out.
• Disconnect the electrical connector from the fuel pump.
• Release the two pipes by simultaneously pressing the tabs and pulling the pipes from the connector.
• Remove the pump module locking ring using a tank cover removal tool or a small heavy hammer/mallet and a piece of soft wood.
• Extract the pump module by lifting the top plate and extending the piping to reach and release the locating clips.
• Carefully lift out the pump module, ensuring that the filter and level float do not get caught or damaged.
• Let the fuel drip back into the tank, then lift out the pump module into a petrol-resistant tray.
• Undo the electrical connector from the pump motor.
• Undo the three small screws from the top of the pump module housing and lift out the damaged pump motor.
• Clean the pump module of any deposits.
• Replace with a new pump motor, using any seals, accessories, and filters provided.
• Replace the housing inner cover, ensuring that the small non-return valve stays in place.
• Carefully relocate the pump module in the tank and click the latches into place.
• Place the outer cover back, ensuring that the locating tabs are correctly aligned.
• Replace the pump module locking ring and tighten by hand to avoid cross-threading. Then tighten with the appropriate tool.
• Reconnect the two pipes and the electrical connector.
• Reconnect the battery.
• Prime the system a few times with the key in position 1. Once the priming noise is stable, attempt to start the engine.
• If the car runs, replace the covers, insulation, seat belts, and seat base.

It is important to note that this guide is based on a 2001 Jaguar S-Type 3.0 V6 and the process may vary slightly for other models or years. Always refer to the specific repair manual for your vehicle and take the necessary safety precautions when performing any repairs or maintenance.

Frequently asked questions