Replacing The Fuel Pump In A 1998 Jeep Wrangler: Diy Guide

If you're looking to replace the fuel pump in your 1998 Jeep Wrangler, there are a few things you should know. Firstly, it's important to disconnect the battery to reduce the risk of fire. You'll also need to remove the fuel tank, which can be a tricky process, so it's recommended to have a helper. Once the tank is removed, you'll need to disconnect the electrical connection, fuel line, and breather line. Then, you can remove the old pump and install the new one, ensuring that it's properly aligned. Finally, reconnect the fuel tank and lines, and check for any fuel leaks before starting the engine. The average cost for a Jeep Wrangler Fuel Pump replacement is between $980 and $1,242, but it's important to note that this may vary depending on your location and the specific model of your car.

Disconnect three connections under the Jeep

Disconnecting the three connections under the Jeep Wrangler is a crucial step in replacing the fuel pump. Here's a detailed guide on how to do it:

• Electrical Connection: Start by locating the electrical connection, which is usually easily accessible. It is essential to disconnect this carefully to avoid any damage. Make sure you have the necessary tools to safely detach the wiring harness.
• Fuel Line: The next step is to disconnect the fuel line. This can be a bit tricky as you need to be extremely careful not to spill any fuel. Make sure you have a suitable container to catch any fuel that may spill during this process.
• Breather Line: Finally, you need to disconnect the breather line. Again, be cautious to avoid any fuel spills. It is always a good idea to have some rags or absorbent materials ready to wipe up any spills or leaks.

Remember to take your time and work carefully when disconnecting these connections. It is important to refer to a trusted repair manual or seek advice from a qualified mechanic if you are unsure about any steps in the process. Safety should always be your top priority when working on your vehicle.

Remove the gas tank

To remove the gas tank from a 1998 Jeep Wrangler, you will need to first empty the tank as much as possible. You can then begin to undo the strap bolts and skid plate bolts to get the tank down.

One method is to use a floor jack to slowly lower the tank. You will need to carefully wiggle the tank around until everything is lined up. It is beneficial to have a buddy help you with this process.

Another method is to use a trans jack to gain enough height to drop the tank. You may need to jack up all four axles on jack stands.

When removing the tank, be careful not to break any lines. It is also recommended to replace the bolts with stainless steel ones.

The hard part is disconnecting the components above the tank. The pump will line itself up, and it screws in. It is also recommended to replace the entire fuel pump assembly.

You will need to disconnect three connections under the Jeep: the electrical connection, the fuel line, and the breather.

The trickiest part is removing the big threaded collar that holds the pump in place in the tank. You will need to disconnect and remove the old pump. Then, insert and connect the new pump and reinstall the collar.

Finally, lift and bolt up the tank. Reconnect the electrical, fuel, and breather lines.

Remove the old fuel pump

Removing the Old Fuel Pump from a 1998 Jeep Wrangler

Before you begin, ensure you have the necessary tools and safety equipment, including gloves and eye protection. Have a suitable container ready to catch any fuel spillage when you remove the pump.

Step 1:

Start by locating the fuel pump under the rear passenger seat. You will need to remove the seat to access the pump. Use a seat removal tool or carefully pry the seat base from the floor. Once the seat is removed, you will see the fuel pump assembly covered by a black access panel.

Step 2:

With the seat out of the way, you can now access the fuel pump. Loosen and remove the screws holding the black access panel in place. Set the screws aside in a safe place, as you will need them later when installing the new pump. Carefully lift the access panel to reveal the fuel pump assembly.

Step 3:

You will now see the fuel pump and the sending unit assembly. The fuel pump is located at the tank's top and is connected to the sending unit by a metal tube. Be careful when handling the assembly, as the fuel level sensor and other components are delicate and can be easily damaged.

Step 4:

Disconnect the electrical connector from the fuel pump. This will require careful manipulation to release the connector without damaging the wires or the locking tab. Once disconnected, set the connector aside, ensuring it is placed where it won't be damaged or cause an obstruction.

Step 5:

You will now need to remove the fuel lines connected to the pump. Use suitable tools, such as line disconnect tools, to carefully release the lines. Have your fuel spillage container ready, as some fuel may spill when the lines are removed. Work slowly and carefully to avoid any damage to the lines or the surrounding components.

With the electrical connection and fuel lines disconnected, you can now carefully lift the old fuel pump out of the tank. This may require some maneuvering, as the pump and sending unit assembly is long and needs to be angled correctly for removal. Once removed, you can dispose of the old pump appropriately or send it for refurbishment if desired.

Insert and connect the new fuel pump

To insert and connect the new fuel pump for your 1998 Jeep Wrangler, follow these steps:

Firstly, ensure that the fuel pump you have purchased is compatible with your Wrangler. For a 1998 model with a 2.5L or 4.0L engine and a 15-gallon tank, you will need a replacement pump with part number E7122MN. This pump is a direct replacement for part numbers AIRTEX E7122MN, BOSCH 67659, CARTER P75046M, PIERCE P407M, and CHRYSLER 5012951AD, among others.

Now, with your new fuel pump ready, you can begin the installation process:

• Place a floor jack or a transmission jack under the gas tank to support it.
• Remove the old fuel pump by undoing the bolts and dropping the tank.
• Pay attention to the trickiest part: removing the big threaded collar that holds the pump in place inside the tank.
• Disconnect the electrical connection, fuel line, and breather line from the old pump.
• Take out the old pump and insert the new one into the tank. Ensure that it is properly aligned and secured with the collar.
• Reinstall the tank by lifting and bolting it back into place.
• Reconnect the electrical, fuel, and breather lines to the new pump.

It is recommended to have a buddy help you out with this process, as it can be tricky. Additionally, some people recommend flushing and cleaning the tank while it is down, although this is not strictly necessary.

Finally, before starting the engine, be sure to prime the new fuel pump according to the manufacturer's instructions. This will ensure that the pump is ready to deliver fuel to the engine when it is started.

Reinstall the gas tank

To reinstall the gas tank of your 1998 Jeep Wrangler, follow these steps:

First, ensure that the tank is empty, or as close to empty as possible. Next, you'll need to slowly lower the tank, using a floor jack or a transmission jack. Take care not to break any lines while lowering it. Once the tank is lowered, you can begin the process of reinstallation.

You'll need to reconnect the electrical connection, the fuel line, and the breather line. Make sure to properly align the pump in the tank, and check that all connections are secure. It is also recommended to flush and clean the tank while it is accessible.

Finally, carefully lift and bolt the tank back into place. Ensure that all bolts are tightened securely, and check for any fuel leaks before starting the vehicle.

Frequently asked questions