No power to fuel pump

Tiny
TEENA BYERS
  • MEMBER
  • 2004 HYUNDAI SONATA
  • 2.7L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 111,546 MILES
I have replaced the fuel pump, fuel filter, camshaft, and crankshaft. It turns over, it does not start. Though I don't know what else to look for. What else to check for. I don't know why it's not getting no fuel to the fuel pump. It worked fine never gave me an issue and then I just woke up the next day and it just turned over it wouldn't start. I've been working on this car for 2 months now. I could really use some help. Anything is great. Thank you
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Wednesday, March 16th, 2022 AT 3:53 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

If you are not getting power to the pump, check a few of the basics. First, there are two fuses that must be good and must have power both to them and from them.

In the under-hood fuse panel, locate the fuel pump fuse and the EGR fuse. Make sure they are both good. If they are, confirm they have power to them. Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Next, remove the fuel pump relay and switch it with a different one in the box having the same part number. If there isn't one, here is a link explaining how to check a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If everything checks good, I need you to check the gray wire at the fuel pump for power. Power will only be present for a couple of seconds when the key is first turned on, so you will need a helper to turn the key. Here is a link you may find helpful when checking wiring:

https://www.2carpros.com/articles/how-to-check-wiring

If there is power, confirm the black wire, which is ground for the pump, has continuity to ground.

If you have power and ground, the pump (new one) is likely bad.

Let me know what you find. Also, I attached the wiring schematic related to the tests I just reviewed for your reference.

Take care,

Joe

See pics below. Note: I had to cut the schematic in half to make it readable for you. I did overlap the two so you can follow from one to the next.
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Wednesday, March 16th, 2022 AT 7:05 PM
Tiny
TEENA BYERS
  • MEMBER
Thank you for replying to me. I'm just now getting a chance to go out there and do everything that you said. I appreciate how you explained everything and for the attachments that you sent me. I will let you know how it goes here in just a little bit thanks again.
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Sunday, March 20th, 2022 AT 8:20 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
You are very welcome. Let me know the results so I can help.

Take care,

Joe
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Sunday, March 20th, 2022 AT 6:53 PM
Tiny
TEENA BYERS
  • MEMBER
  • 2004 HYUNDAI SONATA
  • 2.7L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 111,564 MILES
There were 2 relays, one said it was for a lawn mower or a tractor and the other was for my car, but it was coming up.07 or.08 when I tested it was. I'm assuming it's no good I had to order it. So won't know anything until Tuesday. I'll let u know what happens. Thank you again. Teena B
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Monday, March 21st, 2022 AT 12:59 PM (Merged)

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