[SINasTER]

Don’t know if anyone has had this problem before, my FP-L and FP-H are almost always at 0psi. From time to time my FP-L will give out a reading of 1-3 (so 10 to 30psi) but typically it’s at zero most of the time. Car is running fine on map-6 with a 3.5 additive across all rpm (if I go higher it gives out codes, gotta change my maf sensors).

Can it be because of the maf sensors or both my pump are going bad?

Really doubt it’s the pumps because the car doesn’t stumble on idle and handles full throttle pulls with no problems. I have the impression that the app or the connections and the problems.

I have been having multiple issues with the JB4 since I bought it and it’s still happening. Seems like the hardware is not up to par...

Before someone asks for it, there is no water damage on the board, connections are solid (map sensors and OBDII, my app is up to date and running the latest available map)

[SINasTER]

Just realized that this issue started about when I upgraded to iOS13... would be a crazy hazard to have both my fuel pumps go dead at the same time, just when I upgraded my OS on the platform running my JB4 app but have not issues in regards of fuel demands and consumption

[Terry @ BMS]

There isn't fuel pressure logging on N63 currently. It used to run through the extra fuel pressure wires that we no longer offer.

[SINasTER]

Originally Posted by Terry @ BMS

There isn't fuel pressure logging on N63 currently. It used to run through the extra fuel pressure wires that we no longer offer.

That’s why it was working when the JB4 was tapped into the dme

Will it be something you will recode eventually without tapping into the dme or it’s just not possible anymore?

[Terry @ BMS]

For the N63 it's such a problem child from the factory we simplified the JB4 to a reliable and supportable level. Which is just TMAP connections and OBDII. Beyond that we no longer support extra ECU wires, BCM wires, etc.