Skip the auto shop - Our mechanics make house calls

Q: I found a old fuel pump relay. Do I need to check that first before I get a fuel pump. I had the car for 6 years and I found one i

asked by on

Do I need to check the fuel pump relay before I buy a fuel pump. Because I found a old one in my dash board. It been in there for 6 years. I guess who I bought the car from had changed it out and put the old in the dash board.

My car has 237800 miles.
My car has an automatic transmission.

You can try it but a new relay is pretty cheap and you’ll spare yourself the question of whether it is good or not. If the fuel pump turns out to be bad, then I would put a new pump and relay in at the same time.

Do not forget to also replace the fuel filter, as it can cause the pump to work too hard to produce 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!
  • Home
  • Questions
  • I found a old fuel pump relay. Do I need to check that first before I get a fuel pump. I had the car for 6 years and I found one i

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: Power windows do not work.

Check to see if you are getting power to the white wire to the driver's window switch when the key is on. If not, then check and replace the ignition relay 2 in the engine fuse box. The main circuit...

Q: Rattling noise after replacing everything I could find wrong.

If you request a vehicle noise diagnostic a certified mechanic would be able to pinpoint the noise and get you to a resolution. Among the possibilities that have to be looked at are the exhaust system, any sub-frame attachment points,...

Q: Gas consumption on my car.

Hi there. The readings that you are getting with the MAP sensor is correct. Since your vehicle is burning fuel like crazy, check the fuel filter for if its dirty. Check the injectors for if they are sticking and draining...

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...
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...
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.