Replacing Fuel Pump In Chrysler Aspen: Step-By-Step Guide

If you're looking to replace the fuel pump on your 2007 Chrysler Aspen, there are a few things you should know. Firstly, the fuel pump supplies pressurised gasoline to the fuel injectors in the car's engine and is located in the vehicle's gas tank. Secondly, while a high-quality OEM fuel pump can last a long time, it will eventually degrade and fail, and you may notice symptoms such as a whirring noise from the fuel tank or the car stalling and failing to restart.

To replace the fuel pump, you can either do it yourself or get a mechanic to do it for you. The cost for a Chrysler Aspen Fuel Pump Replacement is, on average, $537, with $236 for parts and $301 for labour. However, prices may vary depending on your location. If you plan to replace the pump yourself, you will need to drain the fuel from the tank and then remove the fuel tank from the vehicle to gain access to the pump. You will also need to remove the fuel pump supply and return hoses, EVAP system hoses, and electrical connections to the pump. Finally, when installing the new pump, it is recommended to replace the fuel filter as well to maximise the life of the new fuel pump.

Purchase a replacement fuel pump

When purchasing a replacement fuel pump for your 2007 Chrysler Aspen, it is important to buy one that is compatible with your car's make and model.

There are several options available on Amazon, including:

• DWVO Fuel Pump, which is designed as a replacement for your worn-out fuel system and will help optimise your vehicle's performance and fuel efficiency. It is designed for a straightforward installation and offers uncomplicated integration.
• MASTER E7184M Fuel Pump Module Assembly, which is made with all new materials under rigorous quality-controlled manufacturing and testing procedures. It is also supported by a local US-based professional team.
• LUJUNTEC Electric Fuel Pump, which improves driving comfort due to its low noise.

There are also several options available on eBay, including:

• Fuel Pump Module Assembly, which is compatible with the 2004-2007 Dodge Durango and 2007 Chrysler Aspen 3.7L, 4.7L, and 5.7L.
• Electric Fuel Pump Assembly No.E7184M, which is compatible with the 2004-2007 Dodge Durango and 2007 Chrysler Aspen.
• Fuel Pump Module Assembly, which is compatible with the 2007 Chrysler Aspen and 2006-2007 Dodge Durango.

Additionally, CarParts.com offers fuel pumps for the 2007 Chrysler Aspen starting at $52, and the average cost for a fuel pump replacement is between $749 and $874.

Remove the old fuel pump

To remove the old fuel pump from your 2007 Chrysler Aspen, you'll first need to test the pump to confirm that it isn't functioning. This is important to ensure that the problem truly lies with the fuel pump and not with another component.

Next, you'll need to gain access to the fuel pump. In some vehicles, you may be able to do this through an access panel above the tank in the passenger compartment. If there is no access panel, you'll need to drain the fuel from the tank and then lower the fuel tank from the vehicle.

Once you have access to the fuel pump, you'll need to remove the fuel pump supply and return hoses, as well as any EVAP system hoses and electrical connections to the pump. With these connections removed, you can then take out the old fuel pump.

It's important to note that working on fuel system components can be dangerous due to the flammable nature of gasoline. If you're not comfortable performing this job yourself, it's best to leave it to a qualified mechanic.

Install the new fuel pump

To install the new fuel pump, follow these steps:

Firstly, ensure that the new fuel pump is compatible with your 2007 Chrysler Aspen. The correct fuel pump should be easy to install and offer a straightforward integration.

Next, if your 2007 Chrysler Aspen has an access panel above the tank in the passenger compartment, you can remove the old fuel pump and install the new one through this access point. If no access panel exists, you will need to drain the fuel from the tank and then lower the fuel tank from the vehicle to gain access to the pump.

Once you have access to the pump, remove the fuel pump supply and return hoses, as well as the EVAP system hoses and electrical connections to the pump.

Now, you can remove the old fuel pump. Attach any reusable brackets and pick-up screens to the new pump, then install the new pump, ensuring all hoses and electrical connections are re-established.

If your fuel system uses an in-line external filter, it is recommended to replace this at the same time.

Finally, add fuel to the tank and run the engine to test for leaks.

It is important to note that some fuel pumps may come with specific installation instructions, so be sure to refer to the manufacturer's guidelines for your specific fuel pump.

Test for leaks

Testing for leaks in a fuel pump is essential to prevent safety risks and engine power loss. Fuel pump leaks can cause a fire in the engine compartment and result in insufficient fuel pressure, leading to reduced engine power.

Part 1: Check for Fuel-Related Issues

Step 1: Listen for the Fuel Pump

Place your ear near the fuel tank and ask an assistant to turn the ignition key to the "on" position. A properly functioning fuel pump will produce an audible noise.

Step 2: Whack the Fuel Tank

Ask an assistant to crank the engine while you hit the fuel tank with a rubber mallet. If the vehicle starts, it indicates that the electric motor inside the pump is faulty. Whacking the tank temporarily jolts the motor into action.

Step 3: Use Starter Fluid (Use with Caution)

Warning: This step can be dangerous and may cause personal injury or engine damage. Ensure you have safety equipment, such as a fire extinguisher, and safety glasses. Do not perform this step on a diesel engine.

To perform this test, remove the air intake and spray starter fluid into the throttle body while an assistant cranks the engine. If the engine starts and runs momentarily, it suggests a fuel-related issue, possibly due to a faulty pump.

Part 2: Check for Diagnostic Trouble Codes (DTCs) and Fuel Trim

Step 1: Check for DTCs

Use a scanner or code reader to check for diagnostic trouble codes (DTCs) in your car's computer system. A faulty fuel pump may trigger DTCs directly related to the fuel pump or indicate an air/fuel ratio problem.

Step 2: Check Fuel Trim with a Scan Tool

If the engine is running, use a scan tool to check the short-term fuel trim (STFT). Typically, fuel trim readings should be between -10 and 10, although this may vary depending on the vehicle. If the fuel trim is above 10, it suggests a lean-running condition, possibly due to a faulty fuel pump or other factors like vacuum leaks.

Part 3: Check Fuel Pressure and Volume

Step 1: Check Fuel Pressure

Use a mechanical fuel pressure gauge, which is inexpensive and readily available, to check fuel pressure. Most modern vehicles have a test port located on the fuel rail.

Connect the gauge as per the instructions in your repair manual and turn the ignition to the "on" position (key on, engine off). Compare the reading on the gauge to the specification in your repair manual. If the reading deviates significantly, it may indicate a faulty fuel pump.

Step 2: Check if Fuel Pressure Holds

When performing a static fuel pressure test, also check if the pressure holds as per the duration specified in your repair manual. If the pressure drops too quickly, it indicates a fuel-related problem, such as a faulty pump check valve or regulator.

Step 3: Check Fuel Volume

Connect the gauge and place the bleed end of its hose into a clean container. Without starting the engine, activate the pump for 15 seconds while holding down the relief valve. Typically, the pump should deliver about a pint of fuel. Consult your repair manual for specific procedures and specifications.

Part 4: Advanced Tests

Step 1: Measure Current Draw with an Oscilloscope

Using an oscilloscope and a low amp clamp probe, connect the probe to the pump's power wire to observe a waveform pattern. A good pump will show a pattern of even "humps," while a faulty pump will exhibit jagged and uneven waves.

Step 2: Use a Professional-Grade Scan Tool

Some high-end scan tools allow remote fuel pump testing. You can activate the pump with the push of a button to see if it is functioning correctly.

Remember to consult your repair manual for specific instructions and safety procedures when performing these tests.

Dispose of the old fuel pump safely

When disposing of the old fuel pump, it is important to be cautious and ensure that all residual fuel is removed. Give the pump a good shake to get rid of any remaining fuel. You can also leave it out in the air for a day or two to allow any remaining petroleum to evaporate.

Once you are sure that the fuel pump is empty, you can dispose of it in the regular rubbish bin. However, it is important to note that gasoline is considered hazardous waste and should not be dumped in the trash, poured onto the soil, or poured down the drain or storm drain. If you are uncomfortable with disposing of the fuel pump in the regular trash, you can explore other options for hazardous waste disposal in your area.

You can search online for "hazardous waste disposal center" or "waste collection site" near you, or contact your local fire department or auto repair shop for guidance on safe handling and disposal of the old fuel pump. Remember to follow any specific guidelines or regulations in your state or county regarding hazardous waste disposal.

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