Took my car out of winter storage after installing a 535lph LPFP in it and started getting a new tune from Doc Vu. I'm seeing big drops in rail pressure. My tuner thinks its the HPFP and so do I but since I just installed the new LPFP I was wondering if there's anything I should check before I drop $1400CAD on a new HPFP. The car doesn't seem to have any issues other than the lack of rail pressure at WOT on the log and cutting spark when it drops. MHD with JB4. Low pressure is fairly steady just below 70psi but does drop to 60psi when I get near peak boost. High pressure starts at 7, peaks at 15 before dropping to 5 around peak boost. Recommendations for diagnosis?
Details: Gtw3684r, on 18psi atm and no port injection.
Log
Details: Gtw3684r, on 18psi atm and no port injection.
Log
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