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Built 2015 STI wont start/fire
Built 2015 STI wont start/fire
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Old 05-16-19, 10:15 AM   #1
AnotherWrx
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Default Built 2015 STI wont start/fire

Hey guys, hope things are well,

I have a 2015 sti with a build motor, gtx3076r cams, 2 walbro 340s I believe. For some reason when I turn it to accessory it is not turning on the pumps it seems and I have no fuel pressure at the rails. It was working fine for a week now when I turn the key to accessory its like the pumps are dead. Not sure what I should be checking.
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Old 05-16-19, 10:20 AM   #2
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Default Re: Built 2015 STI wont start/fire

Its been driving fine other wise but for some reason ive been having this problem where the car will not start
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Old 05-16-19, 10:28 AM   #3
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Default Re: Built 2015 STI wont start/fire

How was the two pumps wired? Did they make a new run for it or are they piggy backing off the stock wiring. Sounds like a fuel pump fuse has blown.
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Old 05-16-19, 10:39 AM   #4
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Default Re: Built 2015 STI wont start/fire

I believe the wiring is good and it had new wires run. There are 3 fuses in a little mount for the pumps, I can check those. I appreciate your input a lot man. If I maybe turn the key on and off a bunch of times it might come back on by chance but the car seems pretty dead at the moment.
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Old 05-16-19, 11:03 AM   #5
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Default Re: Built 2015 STI wont start/fire

If pumps aren’t priming sounds like a fuse may be blown.


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Old 05-16-19, 08:19 PM   #6
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Default Re: Built 2015 STI wont start/fire

if works once in a while relay might be stuck or pumps done...
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Old 05-16-19, 09:03 PM   #7
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Default Re: Built 2015 STI wont start/fire

Can you jump the pumps to run?
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Old 05-17-19, 11:29 AM   #8
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Default Re: Built 2015 STI wont start/fire

Quote:
Originally Posted by Jedi03 View Post
if works once in a while relay might be stuck or pumps done...
OP have the pumps every primed again after this problem occurred? If they intermittently prime then I would start looking at the relays as well as the actual wire connections. A loose wire would make it intermittent. If they never primed again then I would say fuse. Our cars have a fuel pump controller so depending on your install that my come into play as well. Are your pumps hardwired so they run all the time when you car is on?
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