Fuel pump strainer replacement guide

The role of the pump strainer 

The pump strainer is a filter of fine mesh that sits over the fuel pick-up tube. Essentially, it keeps out anything that could contaminate the fuel system, such as dirt, sediment, fuel deposits, rust particles, sand, etc. 

Without this filtration, the fuel pump can easily get damaged. With sediment clogging the system, the fuel pump would have to work much harder. Additionally, the fuel can get contaminated and dirty, which can cause further faults to occur in the fuel injectors.  

Signs and symptoms of a bad fuel strainer 

If the vehicle’s fuel strainer is damaged, the vehicle may display the following signs. It’s worth noting that many of these symptoms can point to other fuel system faults, such as an issue with fuel injection. In a nutshell, they all point to the vehicle not getting the correct amount or mixture of fuel. 

• Reduced engine power 
• Difficulty starting the engine 
• Engine stalling after running for a while 
• Loud noises from the fuel pump area 
• ECU check engine light 

Fuel pump strainer replacement guide 

Follow along with these steps to replace the fuel pump strainer correctly. 

Tools and materials needed 

For this procedure you’ll need: 

• New strainer 
• Socket wrench 
• Fuel line removal tool – not essential, but comes in handy 
• Safety glasses and gloves 

• Cleaning cloth

Safety precautions 

Replacing a fuel pump strainer is straightforward in some vehicles, but others require the tank to be dropped, which can be more complicated. Either way, when working with fuel and flammable materials, it’s important to follow safety procedures. 

1. Ensure the vehicle is off and the battery disconnected to prevent any electrical accidents 
2. Wear appropriate safety gear 
3. Have a fire extinguisher nearby 
4. Use approved containers to catch fuel spills 

Step by step process 

Preparation 

Ensure the vehicle is parked on a flat surface, in neutral with the handbrake on. Locate the car fuse box and remove the fuel pump fuse box or relay. Then, start the engine and leave it to run for a few minutes, then switch off to depressurise the fuel lines. 

Access the fuel pump strainer 

Firstly, you’ll need to locate the fuel strainer. This will be found in the fuel tank of the vehicle. It’s likely to be behind an inspection cover or panel, which you’ll have to remove. Next, place an approved container beneath the fuel pump to catch any fuel spillages when you remove the unit.  

Remove the old strainer 

Pull away the strainer cover by releasing its fastener. It’s a good idea here to clean around the strainer and fuel lines with your cleaning cloth. Now it’s time to remove the strainer. Gently twist and pull, and allow the excess fuel to drain. 

Install a new strainer 

Make sure any fuel pipes are reconnected, then it’s time to test the vehicle. Start the car and look closely to check for any leaks. Then replace the inspection cover, making sure it is secured properly.

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