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Old 05-08-2024, 01:59 PM   #1
carbon fibr
 
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Drives: 2021 ZL1 1LE
Join Date: Apr 2018
Location: Tennessee
Posts: 18
Camaro ZL1, LT4. E85 tune = Broken HPFP

Hi all.
2021 Camaro ZL1, LT4 engine, Manual Trans. Mods: 2" Headers, Intake, Cat delete, DSX flex fuel Sensor.

Curious if anyone has come into issues with a failed High Pressure Fuel Pump (HPFP) after doing an E85 tune.
Got my car up to 55% Ethanol, did a few pulls and after the last pull my HPFP dropped right off to 50psi. Codes: P228C - Fuel Pressure Regulator Control Performance - Low Pressure, P0089 - Fuel Pressure Regulator Performance.
I was dialing in my last tune, verifying if my low-pressure fuel could supply up to 50-60% Ethanol. I didn't expect my HPFP to break; Curious if it could be related to my tune? I'm scared to run E85 now.
FYI: I just ordered a Fuel pump voltage booster & a new stock LT4 HPFP.

Any help greatly appreciated.
I can provide the log if anyone's interested in giving me a second opinion
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