Can anyone confirm if there is a low fuel pressure sensor on the N73?
I was reading some posts on the 3-series boards about HPFP failures and one post mentioned that while using INPA, he noticed the low fuel pressure sensor reading was near the max at 7400 hPa (basically 7.4 bar) and the service advisers were giving him the huge HPFP repair bill estimate. After replacing the low fuel pressure sensor, the INPA reading went down to around 5000 hPa (around 5 bar) and his hesitation/drivability symptoms went
away; the high pressure readings were somewhat constant between 48000-50000 hPa (~48-50 bar).
I looked at the real oem and spaghetticoder sites and didn't find a reference to the low pressure sensors, only the high pressure sensors on the rails.