Skip the auto shop - Our mechanics make house calls

Q: There is no power going to fuel pump. Check relay it's good.

asked by on

There is no power going to fuel pump. I changed relay still no power bought new pump still no power. The car was driving perfectly fine.before Parked it the next morning won't start

My car has 160000 miles.
My car has an automatic transmission.

Hi there. Have you inspected/replaced the fuel pump fuse? The ECM controls the fuel pump relay and this relay will only energize when commanded on. Does the check engine light come on; if not, then the ECM is not turning on. Do all the other combination meter warning lights come on? Are there any codes stored in the ECM? There are a lot of things that need to be verified before replacing any other parts as this will eventually become very expensive. Many times, the battery has failed and the vehicle will not start or provide power; it could simply be worn out or there could be a parasitic draw or a weak alternator that is not properly charging. A test of the battery with a digital tester that provides current voltage, cold cranking amps, and state of health should be done first. The battery is the heart of the electrical system and if it stumbles or fails, it can affect all other systems. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a car does not start inspection.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: message center displays "mech error"

Hello. The "mech error" message is displayed when it is detected that the 6-disc CD changer has had a mechanical problem. Usually this error means that the unit will need to be replaced with another. You may want to bring...

Q: My car will not shift out of drive and into park - 1999 Hyundai Sonata

Hi. This sounds like the ignition switch has a problem and is not allowing the car to go into park. If the ignition switch is not sending the signal to the neutral safety switch that the key is in the...

Q: Won't start after being read with a Genesis Touch reader

I know these two things happened simultaneously but they may not be connected. Check your fuses for your fuel pump. It's turning over which is good, it just sounds like you aren't getting fuel. You could have a bad...

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...
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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...