94 Octane

2009 135i 6mt N54 stock turbos upgraded CP & BOV Upgraded FMIC DPs 85k miles Ocassionally getting a misfire at high load in higher gears like 3 or especially 4. Took a log of a 4th gear pull where the misfires occurred. Sometimes these misfires throw the car into limp, this one didn’t. Suspecting fueling issue, possible fuel supply issue as i graphed the logs and see a fluctuation in my rail pressure under load. Unsure if it’s my LP or HPFP. HPFP was replaced in years past by bmw. Injectors are a mix of 7s and 8s.