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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
JB4 stage 2
Custom exhaust with 3" quad tips
Custom 3" D.P.s
ESR RF2 19" wheels
Front: Michelin Pilot Sport 4S 235/40R19
Front: Michelin Pilot Sport 4S 275/35R19
GPS location alarm system with Tag
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Default 11-27-2019, 12:51 PM

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


BMW 550 M-Sport xDrive 2011
JB4 stage 2
Custom exhaust with 3" quad tips
Custom 3" D.P.s
ESR RF2 19" wheels
Front: Michelin Pilot Sport 4S 235/40R19
Front: Michelin Pilot Sport 4S 275/35R19
GPS location alarm system with Tag
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Default 11-27-2019, 08:56 PM

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


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 11-28-2019, 09:05 AM

Quote:
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.
Thatís 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 itís just not possible anymore?


BMW 550 M-Sport xDrive 2011
JB4 stage 2
Custom exhaust with 3" quad tips
Custom 3" D.P.s
ESR RF2 19" wheels
Front: Michelin Pilot Sport 4S 235/40R19
Front: Michelin Pilot Sport 4S 275/35R19
GPS location alarm system with Tag
Reply With Quote
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Default 11-28-2019, 09:32 AM

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.


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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