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.

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: Was a loud tapping noise while accelerating, and then put in new alternator and got oil change, woke up this morning and want st

You need to look at the oil pressure sending unit just above the oil filter to see if it got damaged when changing the oil filter. If it is the sending unit, then replace it since the fuel pressure will...

Q: Still over heating after replacing radiator and thermostat. What is next plan of attack

Firstly, I would recommend checking the water pump for leaks and testing it to make sure it is flowing correctly. Also, as a means to eliminate another possible problem, while you are at it, I would check the coolant fan...

Q: Car stalls after overheating.

Hi there. Your engine can overheat for any number of reasons. If it is overheating only in stop and go driving and not on the highway then you may have a radiator issue or a cooling fan problem. If it...

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 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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.