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.
attached is the log, you can see it drop off after the last pull while I'm just cruising.
paul jauch zl1 log9.hpl