A failing fuel pump can cause all sorts of headaches, from your car refusing to start to unexpected stalling while driving. If you’ve been experiencing performance issues with your vehicle, the fuel pump could be the culprit. Here are some key signs that your fuel pump may be going bad and what you can do about it.
Symptoms of a Bad Fuel Pump
1. Vehicle Won’t Start or Struggles to Start
The fuel pump is responsible for delivering fuel from the tank to the engine at the correct pressure. If your car cranks but doesn’t start, or takes longer than usual to fire up, a weak or failing fuel pump might be to blame. Lack of proper fuel pressure prevents the engine from getting the necessary fuel to run.
2. Engine Stalling While Driving
A malfunctioning fuel pump can cause your engine to suddenly shut off while driving. This happens when the pump fails to deliver a steady fuel supply, leading to a loss of power. If your car dies at stoplights or while cruising, you may want to have your fuel system checked.
3. Loss of Power Under Load
If your vehicle struggles to accelerate, especially under heavy loads like towing or climbing hills, the fuel pump could be weakening. A failing pump may not be able to keep up with the engine’s fuel demands, causing hesitation or sputtering.
4. Fuel Pressure Bleeding Down
Fuel pressure should remain consistent while your vehicle is off. If the pressure bleeds down over time, it could indicate a faulty fuel pump check valve. This can result in hard starts, as the system has to re-pressurize before the engine gets the necessary fuel. The photo above is of a fuel pump that was bleeding down over time causing an extended crank when starting the vehicle.
5. Whining Noise from the Fuel Tank
A fuel pump that’s on its last legs may start making a high-pitched whining or humming noise from the fuel tank. While some noise is normal, a sudden change in sound or excessive whining could be a sign of trouble.
What Should You Do?
If you notice any of these signs, it’s essential to address them promptly. A failing fuel pump can leave you stranded at the worst possible time. Bring your vehicle to a trusted auto repair shop like Priebe’s Auto Clinic and Tire Center in Oklahoma City for a thorough diagnostic check. Our experienced technicians can test your fuel pressure and inspect your fuel system to pinpoint the issue.
Don’t wait until your car leaves you stranded—if you suspect your fuel pump is going bad, schedule an inspection today!
