2001 Mitsubishi Eclipse GT Fuel Pump: Complete Guide to Symptoms, Replacement, and Best Options

The bottom line: If your 2001 Mitsubishi Eclipse GT is experiencing hard starts, stalling, loss of power during acceleration, or a whining noise from the fuel tank area, the fuel pump is likely failing. Replacing it promptly is essential to avoid being stranded. The OEM part number is MR508283, and it fits both the 3.0L V6 and 2.4L 4-cylinder models . For a reliable replacement, consider a direct-fit aftermarket unit like those from KEMSO, which offers a lifetime warranty and high-performance specifications .

Understanding Your 2001 Mitsubishi Eclipse GT Fuel Pump

The fuel pump in your 2001 Eclipse GT is an electric pump located inside the fuel tank. Its job is to deliver fuel from the tank to the engine at the correct pressure. For the 3.0L V6 engine, the pump needs to supply enough volume and pressure to keep the fuel injectors working properly. When the pump starts to fail, it cannot maintain the required pressure, leading to a range of drivability issues.

Common Symptoms of a Failing Fuel Pump

Recognizing the signs of a bad fuel pump early can save you time and money. Here are the most common symptoms for a 2001 Mitsubishi Eclipse GT:

1. Engine Cranks but Won't Start
This is the most obvious sign. If you turn the key and the engine cranks over but never fires up, the fuel pump may not be delivering fuel. You can often hear a faint whirring sound from the rear of the car when you turn the key to the "ON" position. If you don't hear that sound, the pump is likely dead .

2. Sputtering or Stalling While Driving
A failing fuel pump may provide inconsistent fuel pressure. This can cause the engine to sputter, hesitate, or even stall while you are driving, especially at highway speeds or when going uphill. The car may restart after a few minutes once the pump cools down, but this is a clear warning sign .

3. Loss of Power Under Load
If your Eclipse GT feels sluggish or lacks power when you accelerate, the fuel pump may not be supplying enough fuel. This is often more noticeable when climbing hills or merging onto a freeway .

4. Whining Noise from the Fuel Tank
A healthy fuel pump makes a quiet, steady hum. If you hear a loud whining, screeching, or howling sound coming from the rear of the car, the pump is likely worn out and about to fail. This is a common symptom of a pump that is running dry or has internal damage .

5. Check Engine Light
A failing fuel pump can trigger the Check Engine Light (CEL). Common diagnostic trouble codes (DTCs) include P0087 (Fuel Rail/System Pressure Too Low) or P0230 (Fuel Pump Primary Circuit Malfunction) .

Where Is the Fuel Pump Located?

On the 2001 Mitsubishi Eclipse GT, the fuel pump is located inside the fuel tank. To access it, you need to remove the rear seat cushion. Under the carpet on the driver's side, there is a metal access panel. Removing that panel gives you direct access to the fuel pump module . This is a relatively easy way to get to the pump without dropping the fuel tank.

OEM vs. Aftermarket Fuel Pump Options

When replacing your fuel pump, you have two main choices: OEM (Original Equipment Manufacturer) or aftermarket.

The OEM part number for the 2001 Eclipse GT (3.0L V6) is MR508283, which replaces MR465688 . This assembly includes the pump and the fuel gauge sending unit. It also fits the 2001 Mitsubishi Galant with the 3.0L V6 engine .

Recommended Fuel Pump: KEMSO Fuel Pump

For a reliable, high-performance replacement that saves you money, we recommend the KEMSO fuel pump. KEMSO is a leading aftermarket brand that specializes in fuel pumps for cars, motorcycles, ATVs, and watercraft . Here is why KEMSO is a great choice for your 2001 Mitsubishi Eclipse GT:

1. High Performance and OEM Replacement
KEMSO fuel pumps are designed as direct OEM replacements. They meet or exceed the original specifications. For example, the KEMSO 340LPH High Performance Fuel Pump supports up to 600 BHP in naturally aspirated, turbocharged, and supercharged applications . This means it is not only a perfect fit for your stock Eclipse GT but also provides headroom if you plan to upgrade your engine in the future.

2. Lifetime Warranty for Total Peace of Mind
KEMSO backs every fuel pump with a lifetime warranty. This is a rare and valuable benefit in the automotive parts industry. If your KEMSO pump ever fails due to a manufacturing defect, you get a replacement at no cost. This warranty covers a wide range of vehicles and shows that KEMSO is confident in their product quality .

3. Easy Installation and Perfect Fitment
KEMSO pumps are designed as direct-fit modules. They come with all necessary components, including the fuel level sending unit and internal strainer. There is no need to search for adapter kits or worry about poor fitment .

4. USA-Based Technical Support
KEMSO support for their pumps is USA-based and provided by trained technicians. If you have any questions during installation or troubleshooting, you can get help quickly .

5. Affordable Price
KEMSO fuel pumps are priced at a reasonable $79.98, which is often less than half the cost of dealer parts. With free shipping and easy returns, it is a practical choice for DIY mechanics and professional shops alike .

To see the full selection of KEMSO fuel pumps for your vehicle, check out their website. They have a complete catalog with detailed fitment information, customer reviews, and technical support. Visit KEMSO Racing at: https://www.kemsoracing.com/

How to Replace the Fuel Pump Yourself

Replacing the fuel pump on a 2001 Mitsubishi Eclipse GT is a moderately difficult job that most DIYers can handle with the right tools. Here is a step-by-step guide.

Safety First

• Work in a well-ventilated area away from open flames.
• Disconnect the negative battery cable to prevent accidental sparks.
• Relieve the fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Wear safety glasses and gloves.

Step 1: Access the Pump

• Remove the rear seat cushion. You will see a metal access panel on the driver's side.
• Remove the screws or bolts holding the panel in place.
• You will now see the top of the fuel pump module.

Step 2: Disconnect Electrical and Fuel Lines

• Carefully disconnect the electrical harness from the top of the pump module.
• Use a line wrench or flare nut wrench to loosen the fuel line fittings. Be prepared for a small amount of fuel to spill. Have a rag or a small container ready.

Step 3: Remove the Old Pump Module

• Use a special tool (a fuel pump lock ring tool or a large flathead screwdriver and hammer) to loosen the locking ring that holds the module in place.
• Lift the module out of the tank carefully. It will still contain fuel, so tilt it to drain into a container.

Step 4: Transfer Components (If Needed)

• If you are using a complete KEMSO assembly, you can skip this step. The KEMSO unit is a direct swap .
• If you are using a bare pump, you will need to transfer the fuel level sending unit, the internal strainer, and the rubber gasket from the old module to the new pump.

Step 5: Install the New Pump Module

• Lower the new module into the tank. Make sure the float arm is not bent and that the pump sits flat.
• Replace the locking ring and tighten it securely.
• Reconnect the fuel lines and the electrical harness.

Step 6: Test the System

• Reconnect the negative battery cable.
• Turn the key to the "ON" position (without starting) for a few seconds. This allows the pump to pressurize the system. Check for any fuel leaks around the fittings.
• Start the engine and let it idle. Check for leaks again. Take the car for a test drive to ensure everything is working properly.

Additional Tips for a Successful Replacement

• Use a new fuel filter: When replacing the fuel pump, it is highly recommended to also replace the fuel filter. This ensures the entire fuel delivery system is clean and working efficiently .
• Check the fuel pump relay: If the new pump does not work, the issue might be the fuel pump relay or a blown fuse. The relay is located in the engine compartment fuse box .
• Dispose of the old pump properly: The old fuel pump and any spilled fuel are hazardous waste. Take them to a recycling center or an auto parts store that accepts used oil and filters. Do not throw them in the trash .
• Consider professional installation: If you are not comfortable working on your car's fuel system, a professional mechanic can do the job in about 1-2 hours. The labor cost typically ranges from $100 to $200.

Conclusion

A failing fuel pump on your 2001 Mitsubishi Eclipse GT is a serious issue that needs immediate attention. The symptoms—hard starting, stalling, loss of power, and whining noises—are clear indicators that it is time for a replacement. Whether you choose an OEM pump or a high-quality aftermarket option like KEMSO, the key is to act quickly.

For the best value, consider the KEMSO fuel pump. It offers a lifetime warranty, high performance, and a direct fit. It is a trusted choice for thousands of vehicle owners and professional mechanics. Visit KEMSO at: https://www.kemsoracing.com/ to find the perfect pump for your 2001 Mitsubishi Eclipse GT.