Skip the auto shop - Our mechanics make house calls

Q: Is My Fuel Pump Working?

asked by on

Is my fuel pump working?

A: If your engine starts and runs, then the an...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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: Car stalling and there is a strong gasoline smell.

Hi there. There could be an electrical issue with the cluster panel on the dash causing the gauge to malfunction. For the fuel smell, there could be a vapor fuel line that is cracked under the vehicle or the purge...

Q: Just replaced the fuel pump with a prime choice off of Amazon and put in brand new fuel lines. I can smell the gas but I don't hear the fuel.

Hi there. From the description you have provided, you may be dealing with a combination of problems concerning the fuel pump replacement in your vehicle. First being, it could be the replacement fuel pump, is incorrect by application. Second being,...

Q: Fuel filter

Hello. The only fuel filter on that vehicle is the sock that is attached to the fuel pump. It is not equipped with an external, serviceable fuel filter. If you replaced it when you replaced the pump, then there is...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...