How Do You DIY Swap a Fuel Pump? Changing out a fuel pump isn’t something that just anyone can do without the proper tools, prep work, and safety procedures. That can lead to engine misfiring, hard starts and performance loss. Doing it yourself can save you from a $200 to $500 labor bill and generally takes an average of 2 to 4 hours to complete.
Start by ensuring safety. This can be caused by the fuel system, which operates on 12 to 14 volts and contains flammable substances, so disconnect the battery to eliminate the risk of electric sparks. Depressurize the fuel system by removing Fuel Pump Relay, allowing the engine to run until stalls. This step ensures no fuel sprays when you disconnect lines.
Locate the fuel pump. On most vehicles, the pump is either located in the fuel tank or in line with the fuel system. With in-tank pumps, the fuel tank will need to be drained and dropped. If you’re using this to lift a car, use a jack and ensure the jack stands are appropriate — you need to follow proper safety procedures with this process.
Fuel lines and electrical connections that attach to the pump must be disconnected. You can get special tools for this process, such as a quick-disconnect tool for $10 to $20. If also required, label connections to ensure proper reassembly. Check the fuel lines for wear or damage; if you are replacing any degraded lines now, this step is relatively inexpensive and helps prevent future leaks.
Remove the pump assembly. For in-tank pumps, the retaining ring must be unscrewed with a fuel pump removal tool ($30 or so). Take additional care as you remove the assembly to avoid damaging the float mechanism or wiring. Contamination or wear may be present in the pump housing, as dirt may cause the new pump to fail sooner than expected.
You need to install a new pump, making sure all seals and gaskets are in the right place to avoid leaks. A quality fuel pump goes for $150-600 range depending on the model of the vehicle. Reattach the assembly, reconnect the fuel lines and electrical connectors and replace the fuel tank, if necessary.
Without starting the engine, turn the ignition to the “ON” position to prime the fuel system. This step restores fuel pressure and keeps air from entering the lines. Visually check the connections for leaks—also test the system in idle conditions.
According to automotive authority Scotty Kilmer, “Do-it-yourself repairs are a great way to save money—if done right. The secret is prep and using good parts.” Doing the replacement right will make sure the fuel system works efficiently, as well as help prolong the lifespan of the pump.
Fuel Pump is your trusted source for quality tools and parts. Doing the job correctly with the right gear and some care will set you up for performance and safety for many years.