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Thread: break up

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    break up

    The car goes into boost but at full throttle it breaks up bad.... can someone please help.

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    Can you post a log? We need details on your car... model, mods ect

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    What do you mean by "break up"? Could you be a little more specific. Logs will help, and a better description of what's happening. Is your check engine light coming on? (throwing codes)

    My shot in the dark guess is it's probably a vanos solenoid or fuel pump, leaning toward fuel pump. <----------flat out guess though do not just go replacing these items!
    2009 335i coupe back to stock...for now

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    Can you hold the keyboard closer to the car so we can help? Click here to enlarge



    Seriously though, how do you expect us to help if you do not give us information?
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    Click here to enlarge Originally Posted by alex@ABRhouston Click here to enlarge
    Can you hold the keyboard closer to the car so we can help?



    Seriously though, how do you expect us to help if you do not give us information?
    I was just trying to be polite but I hope OP get's the point now lol

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    this reminds me when I have customers at work putting their phones up to machines and trying to have us diagnose their issues over the phone Click here to enlarge
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    Don't think it's just you that has that happen! lol
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    I think this is his problem


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    Click here to enlarge Originally Posted by rdeterman Click here to enlarge
    this reminds me when I have customers at work putting their phones up to machines and trying to have us diagnose their issues over the phone Click here to enlarge
    I got a good chuckle out of this.

    Once had someone ask me to make a color copy of a black and white photo. I'm like...

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    Well first I'd like to say thanks for the kind words you mean more to me then you know..lol the video was funny but let's move forward. I am some what new the the bmw scene and I got a little excited but hoping some one would ask what was wrong. I don't have my bms USB just yet but will be getting that any day now... The car drives fine but as I stomp on the gas she breaks up and yes a check engine light does come on, I was thinking is could be a vans also but I'm curious to see what it is. When I'm at partial throttle and I lean on it it is fine.. only when I stomp the gas is when it falls on its face.

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    It said something about a boost solenoid which I'm assuming isvanos solenoid

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    Sounds like a misfire. Whats the milage? Have you been doing typical maintenance? Its probably spark plugs if you havnt changed them in a while.

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    What map are you running/boost level? What fuel type? Other mods? Which gears and rpm does this happen? What code are you getting? Have you ever had a tuneup/valve cleaning? When did this problem start?

    If you can answer all of those, we'll have some information to work with for you. All of them please.

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    OP if you have a JB4 you can read codes in the dash w/o the usb cable, I had missfire codes and just took a video using my phone and then "de-coded" them.

    Then email Terry asap Click here to enlarge
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    That's the ting the half cel came on... it happens in 3rd gear. My mods are jb4, dci at the moment and I ran map 1 and map 5.

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    Why aren't you providing details and maintenance history for your car?

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    Read the codes in dash with the JB4. dash command is speedo 1 tach 1.

    http://www.n54tech.com/forums/showthread.php?t=11495

    Then search online for the codes. How many miles are on the vehicle?
    2008 BSM 335i coupe - JB4, BMS intake, meth : Weekend warrior.

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    Click here to enlarge Originally Posted by Tzu Click here to enlarge
    Sounds like a misfire. Whats the milage? Have you been doing typical maintenance? Its probably spark plugs if you havnt changed them in a while.
    This was the exact problem my Maserati had, as soon as boost came on it would break up horribly almost like fuel cut. Changed all 6 plugs and smooth as silk again. Try it, cheap and easy.
    Because racecar.

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    Click here to enlarge Originally Posted by #1rudebwoy Click here to enlarge
    It said something about a boost solenoid which I'm assuming isvanos solenoid
    No, boost solenoid is completely different and not in the engine. Vanos solenoids are really easy to change but are expensive at ~$110/ each (there's an intake and an exhaust solenoid). If you haven't changed plugs in awhile do that first as stated above, it's cheap, and should be done every so often anyway, especially on a tuned car.

    How many miles are on the car? Usually Vanos solenoid issues can pop up as early as ~40k miles (I was at 42k when I replaced mine) so if you're higher mileage it's probably not a bad idea to do that as well. You could even try cleaning the Vanos solenoid to see if it fixes the issue, cleaning usually helps short term but at least helps you troubleshoot. BTW, I hope you're driving the car carefully now and light on the pedal on map 4.
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    Without any logs or codes no one can do anything but guess here, and whats the point in that?

    read codes and post them, get the usb cable and log the car, then you can get help here...
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    Engine diabetes. Also, cancer.

    Gonna need more information. Much more information. When you get down to telling us every detail down to the paint color, just maybe we can help you sir.

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    Click here to enlarge Originally Posted by alex@ABRhouston Click here to enlarge
    Those are great!

    Neil

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    Click here to enlarge Originally Posted by alex@ABRhouston Click here to enlarge
    brilliant ordered two of each Click here to enlarge
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    997.1 tt
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