Where is the fuel pump on a Dodge Ram 50?

The fuel pump on a Dodge Ram 50 is located inside the fuel tank, functioning as an in-tank electric pump rather than a pump housed in the engine bay.

Overview of the in-tank setup

The Ram 50 (the US-market version of the Mitsubishi Mighty Max) typically uses an electric fuel pump mounted inside the top of the fuel tank. The pump is paired with the sending unit, which carries the fuel gauge sender as well. Service access is achieved via a removable plate on the top of the tank, and the exact location of that access panel can vary by year and by cab/bed configuration.

Why the pump is inside the tank

Putting the pump inside the tank helps protect it from heat, reduces vapor problems, and provides stable pressure by drawing fuel directly from the tank. When the ignition is turned on, the pump primes and delivers fuel through the supply line to the engine’s fuel system. Depending on the exact engine and fuel system layout (carbureted versus fuel-injected variants), the surrounding components can differ, but the pump’s basic position remains within the tank.

Where to find the access point on your model

Because the Ram 50/Mighty Max was offered with multiple layouts over its production run, the precise access point for the pump can differ. In most configurations, you’ll reach the pump through a removable top plate on the fuel tank, which may be exposed from the bed floor or via a hatch behind the rear seat. The tank itself is typically mounted under the rear portion of the vehicle, so you may need to inspect from the bed or cab area to locate the plate.

Model-year and configuration considerations

For many late 1980s to early 1990s Ram 50/Mighty Max pickups, the setup is an in-tank electric pump with a combined sending unit. Exact access and removal procedures depend on whether the vehicle has a regular cab, extended cab, short bed, or long bed. When in doubt, consult the factory service manual or a parts diagram for your specific year and body style to confirm the location and procedure.

Accessing and replacing the fuel pump

Accessing and replacing an in-tank fuel pump on a Ram 50/Mighty Max generally follows a standard pattern, though the steps can vary by tank size and mounting. The description below outlines common steps used on many examples of this truck family.

1. Relieve fuel pressure and disconnect the negative battery cable to prevent sparks.


2. Safely raise and support the vehicle, then locate the fuel tank access plate (typically on the top of the tank under the bed or behind the rear seat).


3. Remove the access plate or sending unit assembly cover to expose the pump and wiring harness.


4. Disconnect the electrical connector and the fuel lines from the pump/sending unit assembly.


5. Remove the retaining ring or bolts that secure the pump/sending unit to the tank.


6. Lift the pump/sending unit assembly out of the tank, being careful not to damage the o-ring or seal.


7. Install the new pump/sending unit, ensuring the seal is seated properly and the fuel lines and electrical connections are secure.


8. Reinstall the access plate, lower the tank if it was removed, and reconnect the battery. Refill as needed and check for leaks and proper operation.

After completing any in-tank pump work, start the engine and verify fuel pressure and delivery. If you notice stalls, misfires, or a no-start condition, double-check connections, fuses, and the pump’s power supply. Always dispose of old fuel safely and follow local regulations when handling fuel systems.

Quick troubleshooting notes

If you’re diagnosing a suspected pump failure, several checks can help determine whether the pump is at fault or if the issue lies elsewhere (like wiring, connections, or a failed relay). Use these guidelines cautiously and consider professional help if you’re not comfortable with fuel-system work.

1. Test for voltage at the pump connector with ignition on (some vehicles require the engine to be cranked briefly to read live pressure).


2. Listen for the pump priming sound about a second after turning the key to the On position.


3. Inspect fuses and relays associated with the fuel pump circuit.


4. Check for any fuel leaks or damaged lines around the fuel tank area.

Note: If you replace the pump, use the correct unit for your exact year and configuration, and verify that the sending unit and gauge function properly after installation.

Summary

For the Dodge Ram 50, the fuel pump is an in-tank electric pump mounted inside the top of the fuel tank. Access is via a removable plate on the tank, with the exact location depending on the year and body configuration. Service generally involves removing the top access plate, disconnecting lines and wiring, and replacing the pump/sending unit assembly, followed by a test to confirm proper fuel delivery and pressure. Always consult your specific vehicle manual for precise steps and safety precautions.

How much does it cost to replace a fuel pump on a Dodge Ram 1500?

Replacing a fuel pump on a Dodge Ram 1500 costs between $500 and over $1,300, with the average being around $800-$1,000. The final price depends on the vehicle's year, the cost of parts (OEM vs. aftermarket), labor rates at the shop (independent mechanic vs. dealer), and your location. 
Factors that influence the cost

• Vehicle age: Older models may have lower part costs but can sometimes be more difficult to work on, potentially increasing labor time. 
• Parts quality: The cost of the new fuel pump can vary significantly based on whether you use genuine OEM (original equipment manufacturer) parts or aftermarket alternatives. 
• Shop vs. Dealer: Dealerships generally use OEM parts and have higher labor rates, leading to higher overall costs. Independent mechanics may use aftermarket parts and could have lower labor rates. 
• Labor hours: The time it takes to replace the pump can vary depending on the truck's specific model and how accessible the pump is located inside the fuel tank. 

Getting an accurate estimate

• Contact local shops: Get quotes from both dealerships and independent mechanics for your specific year and model.
• Specify parts: Ask for the cost breakdown for both OEM and aftermarket parts to see the difference.
• Check for included services: Some estimates may include additional parts like the fuel sending unit or sensor, so clarify what is included in the final price. 

Where is the fuel filter on a 2015 Ram 1500?

The 2015 Ram 1500 fuel filter location depends on the engine type. For the EcoDiesel, it's an external filter housed in a black canister, located underneath the truck between the passenger side fuel tank and the rear axle, near the propeller shaft. For gasoline engines, the filter is typically integrated into the fuel pump inside the fuel tank.
 
This video shows the location of the fuel filter on a 2015 Ram 1500 EcoDiesel: 1mBlue Collar GarageYouTube · Dec 13, 2023
EcoDiesel model

• Location: Underneath the truck, on the frame rail, between the passenger side fuel tank and the rear axle. It's located in front of the propeller shaft and near the muffler.
• Appearance: It is in a black housing or canister. 

This video demonstrates the location of the fuel filter on a 2015 Ram 1500 gasoline engine: 44sN31LEYouTube · Oct 24, 2023
Gasoline models

• Location: Integrated into the fuel pump assembly, which is inside the fuel tank. 
• Note: There is no external, serviceable fuel filter to change for gasoline models. To access the strainer, the fuel tank needs to be removed. 

Can you replace a fuel pump without dropping the tank?

Yes, you can replace a fuel pump without dropping the tank, but the method depends on the vehicle. Some vehicles have an access panel under the rear seat, while others require cutting a new access hole in the floor or bed. However, for many vehicles, the recommended method is to drop the tank, which is sometimes easier than it seems, especially when the tank is empty. 
This video demonstrates how to replace a fuel pump without dropping the tank: 57sDaniel EnglingYouTube · Dec 10, 2015
Accessing the fuel pump without dropping the tank

• Check for a factory access panel: The easiest method is if your vehicle has a pre-existing access port in the floor, usually under the rear seat, to reach the fuel pump assembly. 
• Cut a new access panel: If there's no factory panel, some people cut their own. This is a more advanced and risky procedure that requires extreme care not to puncture the fuel tank or lines. 
  • Remove the rear seat and carpet. 
  • Locate the fuel pump on top of the tank. 
  • Carefully cut a hole in the floor above the pump using a grinder. 
  • Replace the fuel pump. 
  • Reattach the cut-out piece with sheet metal and screws. Some suggest leaving it open or adding hinges for future access, although this is generally not recommended due to safety and potential fumes entering the cabin. 

Replacing the fuel pump by dropping the tank 

• This is the method recommended by many mechanics for most vehicles because it avoids the risks associated with cutting through the vehicle's floor. 
• If you don't have a lift, you can use jack stands to raise the vehicle and a floor jack to support the tank. 
• Carefully disconnect the fuel lines and electrical connections from the top of the tank. 
• Support the tank with the floor jack and then slowly lower it, allowing enough room to replace the pump assembly. 
• For many vehicles, it is a good idea to siphon out the fuel to make the tank lighter and easier to handle. 

Important considerations

• Safety: Always disconnect the battery, work in a well-ventilated area, and take precautions against sparks and open flames when working with gasoline. Wear gloves and eye protection to avoid contact with fuel. 
• Complexity: Dropping the tank, even partially, can be a challenge depending on the vehicle's design, particularly if the tank is full or rusted. Cutting an access hole is a potentially dangerous alternative and should only be attempted if you are certain of your abilities and have researched the procedure thoroughly for your specific make and model. 
• Professional help: If you are unsure about either method, it is best to consult a professional mechanic or a DIY garage with the proper tools, especially if you lack experience. 

This video explains the importance of safety when replacing a fuel pump: 59s1A Auto: Repair Tips & Secrets Only Mechanics KnowYouTube · Nov 22, 2020

Where is the fuel pump located?

The fuel pump is most commonly located inside the vehicle's fuel tank, submerged in fuel and accessed through a panel under the rear seat or in the trunk. In modern vehicles with Gas Direct Injection (GDI) systems, there is also a secondary high-pressure fuel pump located near the fuel rail in the engine compartment. In older cars with mechanical fuel pumps, they are often mounted on the side of the engine block.
 
This video shows the location of the fuel pump inside the fuel tank: 57sScotty KilmerYouTube · Jun 23, 2011
In most modern vehicles

• Location: Inside the fuel tank, which is usually located under the rear seat or in the trunk. 
• Access: A panel on the vehicle's floor or trunk provides access to the pump assembly, which is mounted to the top of the tank. 
• Function: The pump is submerged in fuel, which helps keep it cool and ensures a consistent supply. 

In vehicles with GDI systems

• Location: In addition to the in-tank pump, there is a secondary, high-pressure pump.
• Access: This secondary pump is located near the fuel rail in the engine compartment. 

In older vehicles

• Location: The mechanical fuel pump is often located outside the fuel tank. 
• Access: It is typically mounted on the side of the engine block and driven by the camshaft.