Yes, most vehicles have a dedicated fuel pump fuse, often located in the under-hood or interior fuse box, sometimes shared with the fuel pump relay or part of a larger Fuel Injection (EFI) circuit, and checking this fuse is a primary step if your fuel pump isn't working. A blown fuse means no power to the pump, while a faulty relay or wiring issue are also common problems, so check the owner's manual for specific fuse and relay locations.
Electrical faults are a major contributor to fuel pump failures, often stemming from issues such as corroded connectors, loose terminals, or damaged wiring. These problems disrupt the consistent electrical current required for proper fuel pump operation.
Steps to Start a Car with a Failing Fuel Pump
7. Use a Fuel Pump Bypass
The inertia switch is a device that cuts off the power to the electrical fuel pump in fuel injection systems during crashes. Some signs of a failing inertia switch are stalling and no-start conditions.
A: Yes. If your vehicle's fuel pump is running intermittently, or your engine will not start, you may have a bad control module.
The fuel pump relay is an electromagnetic switch that allows electrical current to flow to an electric fuel pump, activating and powering the pump.
Fuel Injection System Fuse (EFI or INJ) Even if the engine turns over, if this fuse is blown, there will be no signal to the injectors or fuel pump, and the engine won't start due to lack of fuel. Fuel Pump Fuse Protects the pump's power circuit.
How can I tell if my FPCM needs repair? Symptoms include engine stalling, failure to start, reduced fuel efficiency, or an illuminated check engine light. A professional diagnostic check is recommended.
Hiring a mechanic to replace your fuel pump can cost between $400 and $600, including both parts and labor. The replacement can take anywhere from one to six hours, depending on the vehicle and the mechanic's expertise.
As mentioned, some FPCMs are located under the back of the vehicle and need the spare tire lowered to access it. You'll usually find these bolted to the frame rail. Other possible locations include under the rear seat on some cars and SUVs, or it may be mounted under the carpeting or in a fender well.
The switch is typically located behind a piece of plastic. This can be your glove box storage bin or near the footrest area. Removing these components might require some elbow grease or tools like screws. The fuel shut off switch's location can also be dark and difficult to reach.
If this solenoid sticks or fails, the engine may not get fuel, which may cause the engine to stall or fail to start. A broken gasoline shutoff solenoid can potentially cause an abrupt and unexpected engine shutdown while the heavy vehicle is moving.
Electrical Issues: Faulty wiring, corroded connections, or blown fuses can disrupt the power supply to the pump, causing it to malfunction or stop working altogether. Overheating: Running a vehicle on low fuel can cause the pump to overheat.
The common signs of a bad fuel pump include: