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  1. #1
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    New to the BMW world, fuel it stage 3 help

    Hey guys I appreciate the add! I just wanted to introduce myself, I live just west of st louis MO. Huge fan of DSM's, Subaru's, a couple built motors. I've been in the saab game for about 7 years and never truely knew power til now. I wanted to try what everyone has been talking about. The N54 platform... I purchased Drepai's 09 335i ST car. Car is amazing. I've fallen in love again.
    List goes as follows, VM/ACF 6466, PI with controller, fuel it stage 3 kit, spec 3 + Mfactory flywheel,
    Vrsf IC, phenoix charge pipe,Jb4 and mhd BEF low boost e85 map 2.
    Especially being single turbo and a california car(no rust)! The car has a history to it, no car accidents but a blown motor... The old owner had a 40k n54 swapped professionally in the car. Everything has been checked out and confirmed. Car is insane. I'm surprised I found this rare gem and the condition its in for being a 9 year old car!

    Fast forward to today Ive had the car for 2 weeks now, the car has a couple I wouldnt say issues but things I'd deff like to fix.
    It has the stage 3 fuel it kit. With a hobbs switch. Previous owner states the secondary fuel pump is not kicking on with 15psi hits.
    Where do I start to look for issues?
    Ive attached a picture of the wiring to the battery and I think the 12+ switch (white wire) is likely the culprit but maybe something else? I dont think the power wire (red) and 12+ switch (white) should be together?
    All the other wiring looks correct. Where do you guys install your 12+ switched wire?

    Attached is the pic of the relay latout.

    Click here to enlarge
    Should I do a few pulls and log it? What parameters do I need to log to see if the second fuel pump it kicking on?

  2. #2
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    BRAND NEW IN BOX 991.2 standard/non-pse SPW cat bypass pipe for sale - $899 shipped

    New generic 991.2 PSE bypass pipes - $499 shipped

  3. #3
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    Red- Battery Positive
    Blue- Positive from secondary pump
    Black- Battery Negative
    White- Going to the front of the car connecting to an Orange/Yellow wire hanging off the JB4 PI controller.
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

    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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    2 out of 2 members liked this post. Yes Reputation No
    The fuel pump ground goes to the battery.
    The black wire is the trigger wire feom the hobbs switch.
    Okay so ill connect the white to the PI controller.

  5. #5
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    Click here to enlarge Originally Posted by 09STBMW Click here to enlarge
    The fuel pump ground goes to the battery.
    The black wire is the trigger wire feom the hobbs switch.
    Okay so ill connect the white to the PI controller.

    You should not be using a hobb switch, take a picture of your PI controller. The trigger is off the PI controller wire you just need to follow the directions I posted above.
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

    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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