Q: If I can hear my fuel pump does that mean its not bad?

asked by on November 11, 2016

I'm getting a cylinder misfire and was assuming its my fuel pump since the guy I bought the truck from told me it would need to be replaced soon, but now testing to see if I hear the fuel pump I do hear it start up for a few seconds. Does that means its good and it could be my ignition coil?

My car has 120000 miles.
My car has an automatic transmission.

Hello. If the fuel pump is loud then that can mean that it is failing. I have also had many fuel pumps make noise for quite some time without having any issues. The only way to know for sure would be to test the fuel pressure. If the pressure is low then the pump would need to be replaced. Since the engine has a misfire I would usually check the spark plugs and ignition coils first. The vehicle may simply need a tune up. If there are no problems there then I do a compression test and check the fuel pressure to see if the fuel pump is fine and to see if there are any internal engine issues. If you want to have this misfire fixed, consider YourMechanic, as a certified mechanic can come to your to diagnose why there is a cylinder misfire and make repairs.

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

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

Vehicle shaking

There could be a combination of faults creating the shaking effect you are feeling. Certain tire defects, particularly internal belt damage or separations, as well as irregular tire wear will cause vehicle shaking, or shimmy, and such could be "set...

Multiople Misfire at almost all cylinders all at once no warning with codes

If you have a multiple misfire, the camshaft tensioners would not be the first place I would look for trouble. I would first check for air leaks and then carefully check the fuel and ignition systems. Camshaft tensioners usually manifest...

Clunking noise from driver side wheel

If the new wheel bearing was not installed with the axle nut set to the factory torque specification, the noise could be from the wheel bearing. Other possible causes of noise at that location are brake interference and a faulty...

Related articles

The Best Used Cars to Buy If You're a Farmer
If If you're a farmer, you know that what you need isn’t a used car – it’s a used pickup truck. How else are you going to haul around hay, implements, garden produce, fertilizer, and all the other things you...
The Best Used Cars to Buy for Dog Owners
Dog Dog owners are a special breed of drivers. When they shop for a used car they have a list of requirements that can be quite different from other drivers, which tends to make the process a bit of a...
How to Replace a Fuel Pump Relay
The fuel pump has a relay that fails when there is no audible humming sound as the ignition is turned and when the car cranks after longer than usual.