Q: Q: Is My Fuel Pump Working?

asked by on

Is my fuel pump working?

If your engine starts and runs, then the answer is: "Yes, your fuel pump is working."

But what if your engine doesn’t start and run? Is your fuel pump working then? This is actually one of the first things that drivability technicians look at when diagnosing a vehicle no-start.

On fuel-injected vehicles, checking for fuel pump operation requires several checks.

First, when you turn the ignition key to the “ON” position, can you hear the fuel pump operate inside the fuel tank? If the answer is yes, then how much fuel pressure is it generating? This is done by attaching a fuel pressure gauge to the fuel rail on the engine. If the answer is no, then why not?

Is there a blown fuse, a bad relay, or a bad electrical connection somewhere? Answering these questions takes more time and further diagnosis.

If the cause of a non-functioning fuel pump is actually the fuel pump, contact a professional mechanic who can replace that fuel pump for you. You don’t come to us; we come to you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Is My Fuel Pump Working?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Getting too much gas and it's flooding out through the cylinder

Hi and thanks for contacting YourMechanic. If fuel is coming out of the exhaust pipe, then the fuel is not being burnt. Check the spark plugs and wires to make sure that they are not burned. If the spark plugs...

Q: Filled in regular instead of premium fuel, CEL came on, P0022 code

Hello there, the P0022 code is indicating that the car's computer has over-retarded the engine timing. This makes sense with the 87 octane gasoline used instead of the 93 octane gasoline. The car was most likely attempting to adjust to...

Q: My rear passenger tire blew out earlier today and tore off some wiring under the car. Replaced wiring but no fuel goes to engine?

To determine if the fuel pump is disconnected, turn the key to the "on" (not start) position and listen for the in tank fuel pump momentarily running (the pump should make a brief "whirring" noise and then stop). If you...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...