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MaristFernas MaristFernas is offline
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Default External Trigger for 2nd LPFP? - 10-16-2020, 01:10 AM

I've got an '08 535xi that I'm trying to run the 2nd pump of a stage 3 setup with the external trigger in JB4. I've connected the trigger wire for the relay to pin #7 on the DB9 connector like it says to in the Fuel-it video. When the car is on the external trigger settings work like they are supposed to, when I turn the car off and take the key out the pump kicks essay writer back on and runs constantly. Anyone know what's going on? I've unplugged the wiring for the relay for now to keep from draining the battery while the car is sitting. Thanks.

Last edited by MaristFernas; 10-18-2020 at 10:49 PM..
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deltalima0 deltalima0 is offline
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Default 10-16-2020, 06:07 AM

I had an issue similar, shop could not figure out if the problem was hardware, jb4 or how to connect correctly and finally just used a hobb's switch, easy simple solution.


2011 335is DCT
Pure Stage 2 Hi-Flo Turbos | PSP outlets | RB Inlets | Wagner Evo 2 intercooler | Wagner Dpipes's | JB4 G5/MHD| Precision Raceworks Coils |PFS Bucketed Double shot LPFP | Phoenix Charge Pipe with Tial BOV | JB4 G5/MHD | BMS DCI's

RIP 2007 E90 335i
Doc Race 6266 Single Turbo | TFT Charge Pipe | JB4 G5/MHD | FuelIt stg 3 LPFP | Cpe/BMS PI | 100% E85 | DSS Axles | Cpe FMIC | Tial BOV

N54 World Record ET: 10.721 | Best MPH 130.92
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Schläfer Schläfer is offline
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Default 10-20-2020, 08:28 AM

You have to run the trigger/relay off of a switched on power source, I used the power wire from the exhaust flap solenoid in the trunk.
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