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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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06-28-2020, 12:28 AM | #1 |
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Fuel pressure loss
Hey guys,
I have an LS swapped FRS. I'm using the stock fuel system up to the engine except I upgraded the pump with a DW65C. I've run on it for 2 years. So on my way home from a car show today I noticed my fuel pressure was really low. Normally 59psi. It was about 35psi. I pulled and reinstalled my fuel pump. The car idles at 40psi and jumps to 59psi at 2000rpm. Once the fuel pump shuts off, I lose all pressure within a few seconds. Anyone have any ideas? @solidsnake11 Sent from my ONEPLUS A5010 using Tapatalk |
06-28-2020, 04:26 AM | #2 |
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Is it an electric fuel pump?
Back in the day, I would have suggested to check and make sure the fuel filter was not clogged up. Then if it was clear, I would disconnect and blow out the fuel line. Today - I |
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06-28-2020, 05:30 AM | #3 |
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If you have 2-3 o-rings on the pump, they're likely not seated. I replaced my DW with a Walbro and haven't looked back because of this.
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The Following User Says Thank You to Mr_Eyo For This Useful Post: | solidsnake11 (06-28-2020) |
06-28-2020, 09:51 AM | #4 |
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06-28-2020, 09:53 AM | #5 | |
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Quote:
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The Following 2 Users Say Thank You to Ashikabi For This Useful Post: | humfrz (06-28-2020), solidsnake11 (06-28-2020) |
06-28-2020, 10:23 AM | #6 | |
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Quote:
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The Following User Says Thank You to solidsnake11 For This Useful Post: | humfrz (06-28-2020) |
06-28-2020, 10:32 AM | #7 |
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Leak in the fuel pump assembly or your pump is getting tired or the one way valve has trash in it.
I'm leaning towards a leak. I had a line split in the tank before results were 2 burnt pistons. Last edited by solidsnake11; 06-28-2020 at 11:06 AM. |
06-28-2020, 02:54 PM | #8 |
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I took out my fuel pump and one of the sealing O Rings was deformed slightly. I replaced it with a fuel injector oring(only one available) and it fixed the problem 99%. I'll be ordering new Orings of the correct size soon. Thanks for the input boys
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The Following 2 Users Say Thank You to Ashikabi For This Useful Post: | humfrz (06-28-2020), solidsnake11 (06-28-2020) |
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