Skip the auto shop - Our mechanics make house calls

Q: Is my fuel pump bad?

asked by on

I tested my fuel pressure in my truck with the key on engine off and the psi went up to 60 then almost immediately dropped... does this mean my fuel pump is bad?

A: This means your fuel pump is coming on like...

This means your fuel pump is coming on like it should. The pump will cycle on for a few seconds and then turn off if you just turn the key to on. This should happen each time you cycle the key.

60 psi is normal also. The pressure should stay close to 60 psi after the key is off for a long time to keep pressure at the injection system.

If the pressure drops to 0 psi real quick then you have a leak down problem and the fuel system would need to be checked to see if it is the fuel pump, pressure regulator or injection system not holding pressure. The pressure regulator and fuel pump are the most common failures of not holding the pressure.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: harm of replacing fuel filter

The fuel filter replacement will never be a bad thing. A clogged filter is worse.

Q: Rav 4 problem

Hello. The issue you are describing could stem from a fault in the fuel or ignition system. Basically, a mechanic would have to diagnose the fuel supply, whether the pump is producing enough pressure or you have a blocked fuel...

Q: Needing a name of a hose and fitting

Hello, thanks for writing in about your GMC Sierra 1500. The fitting you are talking about is the fuel pump housing that seals to the top of the fuel tank. This assembly is called a fuel pump module. The hose...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.