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01-26-2023, 12:43 PM | #1 |
Scooby Newbie
Member#: 498142
Join Date: Feb 2019
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2008 Fuel pump polarity
Does anyone know what the fuel pump polarity is on the 2008+ WRX? I have the wiring diagrams, but it doesn't say which wire is ground and which wire is the voltage supply, I've got a green/red wire and a green/yellow wire. I have a WRX at my shop that will only run when the fuel pump is commanded at 100%. As soon as it tries to modulate it down to 67%, the pump shuts off and the car dies. I want to jump the pump so i can drive it into the shop and try to figure out if it is the pump or the module.
Thanks!
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01-30-2023, 05:34 PM | #2 |
Scooby Newbie
Member#: 498142
Join Date: Feb 2019
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Just in case anyone else runs into this, It appears that green/yellow goes to Black and green/red goes to Blue inside the tank. It appears that the customer installed a AEM 50-1215 fuel pump. That pump is not a PWM pump, which is why it would cut out when the FPCM tried to modulate the pump down to 67%. I ordered a new stock pump and expect the car to run after that...
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03-16-2023, 01:39 AM | #3 |
Scooby Newbie
Member#: 533543
Join Date: Mar 2023
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Any update here in terms of if that was the solution or not? Would be good to know.
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03-16-2023, 11:13 AM | #4 |
Scooby Newbie
Member#: 498142
Join Date: Feb 2019
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New stock fuel pump fixed the problem. Car has been running fine since!
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