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Fuel pump not working anymore?

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Old Feb 7, 2024 | 07:49 AM
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From: Constanţa
Fuel pump not working anymore?

After leaving my FD sitting for 2 days, I came to start it but can't hear the fuel pump priming, and of course, it didn't start.
I do hear a click from the relay in the back, and could hear the fuel pump 2 days ago priming after I turn the key.
What are some things to check? Is my fuel pump bad? Is it some relay? How can it just.. break after sitting when it ran perfectly 2 days before?
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Old Feb 7, 2024 | 08:32 AM
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From: Constanţa
checked the fuses, and the fuel pump seems fine
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Old Feb 7, 2024 | 09:01 AM
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Do you have a way of checking your fuel pressure?
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Old Feb 7, 2024 | 09:09 AM
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From: Constanţa
Not really
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Old Feb 7, 2024 | 09:28 AM
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Is there a way to test if it's the EGI relay? or the fuel pump relay? Or even the pump without needing special tools
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Old Feb 7, 2024 | 12:14 PM
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From: https://www2.mazda.com/en/100th/
Originally Posted by ZeroTwo
Is there a way to test if it's the EGI relay? or the fuel pump relay? Or even the pump without needing special tools
in the factory setup, you can jump the FP and GND in the diagnostic box, and when you turn the key on the pump should run.


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Old Feb 7, 2024 | 01:45 PM
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From: Tampa
Originally Posted by ZeroTwo
How can it just.. break after sitting when it ran perfectly 2 days before?
this is the standard of living with an FD...

do you have an aftermarket pump? after you jump the pump at the diag box and it still doesn't work then you will need to pull the hanger
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Old Feb 7, 2024 | 01:55 PM
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From: Constanţa
I get current to the lead heading to the pump.. I haven't tried to jump it, but will in a few hrs
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Old Feb 8, 2024 | 10:09 AM
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Update! It wasn't the pump. It was just the relay. After re-installing the pump I started the car, it ran fine for 2 minutes. Went inside, revved it a bit ( 3k rpm )to move it, then it just died. Tried starting again and after a few tries, it started, but only on one rotor, and there are tons of missfires. Can an engine just flood while.. running?
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Old Feb 8, 2024 | 10:11 AM
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From: Constanţa
Im guessing the engine got flooded. It did smell a bit like gas. But how come that the engine just did that after it started? Maybe something got in the tubes while I took out the pump? I'm a new owner and I am worried not to brick anything
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Old Apr 11, 2024 | 01:28 PM
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From: Constanţa
Update. It was bad wiring causing the relay to short, not giving proper power to the pump, THUS not making enough pressure...
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