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SINasTER SINasTER is offline
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Posts: 79
Join Date: Dec 2015
Car: BMW 335xi E90
Exclamation Fp-l and Fp-h problems - 11-27-2019, 09:09 AM

Donít 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 itís 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 itís the pumps because the car doesnít 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 itís 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)

BMW 550 M-Sport xDrive 2011
HPE DME Stage 2 tune
JB4 backend flash
Custom valved exhaust with 3" quad tips
Custom 3" D.P.s
ESR RF2 19" wheels
Front: Firestone Firehawk Indy 500 235/40R19
Front: Firestone Firehawk Indy 500 285/35R19
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