Rajan Wilcox
If your 1998 Ford F-150 fuel tank needs to be pumped out, it's likely because the fuel pump is faulty. This could be due to a lack of pressure, causing the engine to choke or struggle to maintain speed, or the pump may be clogged. A faulty fuel pump will eventually lead to engine failure, so it's important to address the issue promptly. To replace the fuel pump, you can either access it through the top of the fuel tank via an access panel or by removing the tank from the vehicle. The latter method involves lifting or dropping the bed and then unscrewing the bolts that secure the pump assembly.
| Characteristics | Values |
|---|---|
| Fuel pump replacement | Drop the tank, remove gas, turn the rear vent 1/4 counter-clockwise, and remove fuel |
| Fuel pump access | Remove the bed, lift with strong force, disconnect fuel lines and electrical connectors |
| Fuel pump issues | Engine chokes, struggles to maintain speed, car won't start, stalling, check engine light on, whirring sound from fuel tank |
| Fuel pump replacement cost | $611 - $894 (national average) |
| Fuel pump types | Delphi, Bosch, Carter, DeatschWerks, Walbro, GMB, Replace, Carquest |
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What You'll Learn
Warning signs of a bad fuel pump
A faulty fuel pump can cause havoc with your Ford F150's performance and even leave you stranded. The fuel pump is like the heart of your vehicle, and neglecting issues with it can lead to costly repairs. Here are some warning signs that indicate a bad fuel pump:
Firstly, one of the most common signs of a failing fuel pump is an increase in the engine's temperature. This can be accompanied by sudden surges and stalling. Surging is caused by too much fuel being sent to the engine, resulting in repeated speed increases and decreases. This can also lead to higher levels of harmful emissions, causing your vehicle to fail an emissions test.
Secondly, you may experience issues with starting the vehicle. This could manifest as a struggle to start the car, or it may not start at all. The car may require more cranks than usual to turn over, or it may cut out and then refuse to start. This can be more noticeable when the tank has less fuel, or when parked facing uphill.
Thirdly, a bad fuel pump can cause unusual noises, such as a low-grade whining or whirring noise coming from the fuel tank. This is due to an increase in the pitch of the normal, low humming sound of the fuel pump.
Finally, keep an eye out for poor fuel efficiency. A damaged fuel pump can allow excess fuel into the engine, resulting in lower gas mileage. Additionally, you may notice power loss, sputtering at high speeds, engine misfires, and acceleration issues.
It is important to pay attention to any changes in your vehicle's performance and consult a professional mechanic if you notice any of these warning signs.
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Removing the bed vs dropping the tank
When it comes to accessing the fuel pump on a 1998 Ford F-150, there are two main options: removing the bed or dropping the tank. Here is a detailed comparison of the two methods:
Removing the Bed:
- This method provides easier access to the fuel pump, as it is located at the top of the fuel tank.
- It eliminates the need to work underneath the truck, which can be more convenient and comfortable.
- If the fuel tank is full, removing the bed avoids the hassle of emptying and storing a large amount of gasoline.
- The bed is secured by six T50 Torx bolts, which need to be removed. The size of the bolts may vary by model year.
- After removing the bolts, disconnect the wiring for the tail and license plate light assemblies.
- Remove the fuel filler cap and strap that secures the filler neck to the bed.
- The bed needs to be lifted and possibly slid back due to the way it wraps around the cab. This can be done with strong force or tools like a come-a-long or chain hoist.
- With the bed removed, the fuel pump assembly can be accessed, and the pump replacement can be performed.
Dropping the Tank:
- This method involves dropping or lowering the fuel tank to access the fuel pump from underneath the truck.
- It may be simpler if the bed bolts are corroded or difficult to remove.
- Dropping the tank allows direct access to the fuel pump without the need to remove the bed.
- Before dropping the tank, it is recommended to replace the fuel tank straps due to their history of corrosion issues.
- Disconnecting the fuel lines can be challenging, and special tools may be required.
- Draining the fuel from the tank or handling a full tank during this process can be an additional consideration.
- With the tank lowered, the fuel pump can be reached, and the replacement can proceed.
Both methods have their advantages and can ultimately lead to accessing and replacing the fuel pump. The decision between removing the bed vs dropping the tank may depend on factors such as the condition of the bed bolts, the fuel level in the tank, and personal preference for working from the top or bottom of the truck.
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How to access the fuel pump
Accessing the fuel pump on a 1998 Ford F-150 can be a moderately complicated job, and it may be best performed by a professional mechanic at a dealership or service centre. However, if you are confident in your abilities, here is a step-by-step guide on how to access the fuel pump:
Firstly, you will need to remove all the bolts, tail lights, straps, electrical connections, cab protection, tailgate, bed liner, breather, and filler neck. This process can be time-consuming and intricate, so take care not to miss any steps.
Next, you will need to lift and slide the bed to the rear by approximately 3 feet. This step requires a lot of strength, so it is recommended to have two to four people assisting you. Once the bed is lifted, you can reconnect the tie-downs and use a tool like a Kubota's FEL to lift the bed, then back up a few feet and set it down.
With the bed out of the way, you will have easy access to the fuel pump. The fuel pump is secured by bolts and connected to fuel lines, so you will need to remove these carefully. The bolts are typically metric and can be simply unscrewed. The fuel lines use quick connects, so you will need a special tool to detach them. Once the bolts and lines are removed, the electrical connector can be disconnected, and the pump assembly can be lifted out.
It is important to note that working on a fuel system can be dangerous, and it is always recommended to seek professional assistance if you are unsure about any part of the process.
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Fuel pump replacement
A fuel pump replacement is necessary when the fuel pump fails. Some signs of failure include a car that won't start, a stalled engine, or a slowly starving fuel flow, causing the check engine light to come on. A whirring sound coming from the fuel tank may also indicate that the fuel pump is about to fail, as fuel pumps do not normally make noise.
The fuel pump in a 1998 Ford F-150 is located inside the fuel tank. To replace it, you will need to remove the bed and drop the tank. You will then need to disconnect the fuel lines and the electrical connector from the pump assembly before lifting out the old pump and installing the new one. Here is a step-by-step guide:
- Remove the bed of the truck. This will require some strong force to lift, but once removed, the fuel pump will be easily accessible.
- Disconnect the two fuel lines from the pump. These use quick connects, so you will need a special tool.
- Unscrew and remove the eight metric bolts securing the pump.
- Disconnect the electrical connector from the pump assembly.
- Lift out the old pump assembly.
- Insert the new pump assembly, ensuring that the thick rubber gasket is attached to the bottom of the pump mounting plate.
- Secure the pump to the tank using the bolts.
- Slide the fuel lines back onto the new pump until they click.
- Reconnect the electrical connector to the new pump.
It is important to note that this process is moderately complicated and may be best performed by a professional mechanic or at a dealership's service department. Additionally, some users have noted that it is easier and faster to follow the Ford service manual when replacing the fuel pump.
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Fuel pump priming
The fuel pump in a 1998 Ford F-150 is located inside the fuel tank and is controlled by the PCM (Engine Computer). It has a small electric motor that ensures pressurised gasoline flows to the engine to power the vehicle.
To prime the fuel pump, turn the key on and off about three times after replacing the fuel pump to let the pump prime the rail. You should get 13-17 PSI with just the key turned on from the pump.
If the fuel pump is not working, you can try to verify the fuel pressure with a fuel pressure gauge. If the pressure is low, you may need to replace the fuel pump and filter.
Fuel Pump Replacement
If you need to replace the fuel pump, you can either take your car to a service centre or attempt to do it yourself. Here are the steps to replace the fuel pump yourself:
- Remove the bed and drop the tank.
- Turn the rear vent 1/4 counter-clockwise to remove the fuel.
- Access the fuel pump by unscrewing the eight metric bolts and removing the two fuel lines and the electrical connector.
- Lift out the old pump assembly and slide in the new pump assembly.
- Secure the new pump assembly with the bolts, slide the fuel lines back on, and reconnect the electrical connector.
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Frequently asked questions
Warning signs of a bad fuel pump include an engine that "chokes" or struggles to maintain speed. If you ignore these symptoms, your engine will eventually fail to start.
You can either get this done at your dealership’s service department or do it yourself. To do it yourself, you will need to lift the bed and remove the fuel tank. You will then need to access the fuel pump by unscrewing the bolts and removing the fuel lines.
The average national cost for a fuel pump replacement across all vehicles is roughly between $611 and $894 (including parts and labor).
Turn the rear vent 1/4 counter-clockwise and it will pop out. You will then have about a 1.5" opening to remove the fuel.
