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Old 09-23-2022, 11:37 PM   #1
quicklol
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Default Fuel pump isnít priming

I bought my car two weeks ago, it had no issues because everything was rebuilt to stock on it. It starts up with one too two clicks. But it does have a intake down pipe and exhaust it has a check engine light because of the o2 sensor from the down pipe. No tune as of now. But three days ago I go to start my car. But it doesnít start. I noticed my fuel pump isnít priming. I was looking all threw the forms and did everything other people has said, I checked all my fuses none of them are blown. I checked to see if I was getting power too the fuel pump relay. And then I checked if I was getting power underneath the passenger side in the back that goes straight to the fuel pump with a 12v circuit tester. And Iím getting power. I have checked all my grounds and there all secure. The owner recently replaced it with an oem one. It randomly started working yesterday out of nowhere so I took it for a drive the parked it then it stopped working again. Iím am very confused on what is going on. The car has a brand new wiring harness and brand new ecu. This car was put back to stock before he sold it to me. I donít know what could be the issue.


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Old 11-02-2022, 08:45 PM   #2
HarryGibson
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Old 11-30-2022, 09:21 AM   #3
Baldwinw
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If you checked your fuse and relay I would try looking at your fuel pressure regulator and maybe try changing the fuel filter. But it sounds like a burnt pump.
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Old 01-27-2023, 09:54 PM   #4
Boosted_Rexi
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Quote:
Originally Posted by quicklol View Post
I bought my car two weeks ago, it had no issues because everything was rebuilt to stock on it. It starts up with one too two clicks. But it does have a intake down pipe and exhaust it has a check engine light because of the o2 sensor from the down pipe. No tune as of now. But three days ago I go to start my car. But it doesnít start. I noticed my fuel pump isnít priming. I was looking all threw the forms and did everything other people has said, I checked all my fuses none of them are blown. I checked to see if I was getting power too the fuel pump relay. And then I checked if I was getting power underneath the passenger side in the back that goes straight to the fuel pump with a 12v circuit tester. And Iím getting power. I have checked all my grounds and there all secure. The owner recently replaced it with an oem one. It randomly started working yesterday out of nowhere so I took it for a drive the parked it then it stopped working again. Iím am very confused on what is going on. The car has a brand new wiring harness and brand new ecu. This car was put back to stock before he sold it to me. I donít know what could be the issue.


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i have a similar problem where after i put gas in my 2007 Subaru WRX the car cranks but wonít start. so i turn it off than on, and crank it again and she sputters than eventually after i turn the key on, and crank it enough (3-4 times) itíll start. but she misfires for a few minutes till i rev it or start driving and the misfire goes away. would that be also fuel pump not priming ?


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Old 01-27-2023, 09:59 PM   #5
Boosted_Rexi
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Quote:
Originally Posted by quicklol View Post
I bought my car two weeks ago, it had no issues because everything was rebuilt to stock on it. It starts up with one too two clicks. But it does have a intake down pipe and exhaust it has a check engine light because of the o2 sensor from the down pipe. No tune as of now. But three days ago I go to start my car. But it doesnít start. I noticed my fuel pump isnít priming. I was looking all threw the forms and did everything other people has said, I checked all my fuses none of them are blown. I checked to see if I was getting power too the fuel pump relay. And then I checked if I was getting power underneath the passenger side in the back that goes straight to the fuel pump with a 12v circuit tester. And Iím getting power. I have checked all my grounds and there all secure. The owner recently replaced it with an oem one. It randomly started working yesterday out of nowhere so I took it for a drive the parked it then it stopped working again. Iím am very confused on what is going on. The car has a brand new wiring harness and brand new ecu. This car was put back to stock before he sold it to me. I donít know what could be the issue.


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Quote:
Originally Posted by quicklol View Post
I bought my car two weeks ago, it had no issues because everything was rebuilt to stock on it. It starts up with one too two clicks. But it does have a intake down pipe and exhaust it has a check engine light because of the o2 sensor from the down pipe. No tune as of now. But three days ago I go to start my car. But it doesnít start. I noticed my fuel pump isnít priming. I was looking all threw the forms and did everything other people has said, I checked all my fuses none of them are blown. I checked to see if I was getting power too the fuel pump relay. And then I checked if I was getting power underneath the passenger side in the back that goes straight to the fuel pump with a 12v circuit tester. And Iím getting power. I have checked all my grounds and there all secure. The owner recently replaced it with an oem one. It randomly started working yesterday out of nowhere so I took it for a drive the parked it then it stopped working again. Iím am very confused on what is going on. The car has a brand new wiring harness and brand new ecu. This car was put back to stock before he sold it to me. I donít know what could be the issue.


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i have a similar problem where after i put gas in my 2007 Subaru WRX the car cranks but wonít start. so i turn it off than on, and crank it again and she sputters than eventually after i turn the key on, and crank it enough (3-4 times) itíll start. but she misfires for a few minutes till i rev it or start driving and the misfire goes away. would that be also fuel pump not priming ? the entire fuel system is aftermarket (braided lines, perrin rails, id1050x injectors, and aem high flow pump)


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Old 01-28-2023, 03:08 PM   #6
LAS04subie
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2005 Wrx
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I recently had a similar problem. I do have an aftermarket pump and itís hardwired so different from stock setup. But my wiring near the pump was bad. I would pull out the pump and check the connections from the actual pump make sure those are fine. I could wiggle mine and it would work and stop working as well. Check the wires right under the fuel pump cover as well. I guess I should mention my car is an 05 WRX Iím not sure what year your car is.
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Old 03-07-2023, 07:31 PM   #7
Elrod660
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Have to agree, sounds like the fuel pump burned out.
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Old 03-10-2023, 10:48 AM   #8
Jerrby
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I would also assume a bad fuel pressure regulator possibly. I've heard many times about the oem subaru fpr are flawed and deteriorate.
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Old 04-02-2023, 01:07 PM   #9
MattSiebers
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Quote:
Originally Posted by quicklol View Post
I bought my car two weeks ago, it had no issues because everything was rebuilt to stock on it. It starts up with one too two clicks. But it does have a intake down pipe and exhaust it has a check engine light because of the o2 sensor from the down pipe. No tune as of now. But three days ago I go to start my car. But it doesnít start. I noticed my fuel pump isnít priming. I was looking all threw the forms and did everything other people has said, I checked all my fuses none of them are blown. I checked to see if I was getting power too the fuel pump relay. And then I checked if I was getting power underneath the passenger side in the back that goes straight to the fuel pump with a 12v circuit tester. And Iím getting power. I have checked all my grounds and there all secure. The owner recently replaced it with an oem one. It randomly started working yesterday out of nowhere so I took it for a drive the parked it then it stopped working again. Iím am very confused on what is going on. The car has a brand new wiring harness and brand new ecu. This car was put back to stock before he sold it to me. I donít know what could be the issue.


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I have an 02 wrx with a similar issue. Two things I looked at that might help you was putting direct power to the fuel pump with a battery or jump pack and a wire to see if it even accepts power, and I am not 100%sure about this one but there is a second relay in the same location as the fuel pump relay, I believe it is a dark orange color. From what I could find it is related to powering the fuel pump as well as some other things. Hope this helps!
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