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  1. #1
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    Injector Calibration

    So from what I've read it seems that injectors need to be calibrated when they are changed.
    Is there a DIY with BT cable? Or is this something that can only be done by the dealer using some sort of special tool?

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    I hope there is a DIY, considering there will probably be a fuel system upgrade in the future and I plan on installing it myself.

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    I don't think this is something you would want to calibrate yourself. With how sensitive DI seems to be wouldn't you want someone with experience doing this like the dealer?

    I haven't seen anything regarding the BT and injector calibration, is that even possible with the BT?
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    Calibrated to what?
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    I don't think this is something you would want to calibrate yourself. With how sensitive DI seems to be wouldn't you want someone with experience doing this like the dealer?

    I haven't seen anything regarding the BT and injector calibration, is that even possible with the BT?
    How are people going to go to the dealer with a GTX42r strapped on? I would hate to pay them to calibrate my upgraded injectors, if they even will. Engine builders are going to need to be able to do this.

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    Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
    How are people going to go to the dealer with a GTX42r strapped on? I would hate to pay them to calibrate my upgraded injectors, if they even will. Engine builders are going to need to be able to do this.
    The dealer doesn't only do warranty work. You can get them to do work on factory BMW parts unless they are too big to care.

    I definitely agree with you that engine builders are going to need this ability and if the dealer can do it they will be able to as well. The main point is to have someone who knows what they are doing do it.
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    Aren't injector's FLOWS calibrated to EACH OTHER so to be balanced within the sytem?

    Do you mean calibrate the ECM to throw MORE fuel at the injectors?
    Or is direct injection different?
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    Click here to enlarge Originally Posted by milkt Click here to enlarge
    Or is direct injection different?
    DI injectors are different due to the high pressure I believe.
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    Click here to enlarge Originally Posted by milkt Click here to enlarge
    Aren't injector's FLOWS calibrated to EACH OTHER so to be balanced within the sytem?

    Do you mean calibrate the ECM to throw MORE fuel at the injectors?
    Or is direct injection different?
    Apparently DI is different. Maybe to have to calibrate each one to the HPFP position, considering it is cam driven? Hopefully someone here has more knowledge. I'm sure if there was a detailed DIY many people would be capable of performing it themselves. It's not like every BMW tech that does injectors on an N54 is a rocket scientist.

    It is nice to just pay somebody to do it, but I'd rather learn myself.

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    Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
    Hopefully someone here has more knowledge.
    Hopefully one of the tuners chimes in.
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    I replaced my #6 injector @ VAC. They had to get a file from europe to code it, but they did and it worked, so its not only BMW that can do it Click here to enlarge CANNOT do it with BT though.. not yet anyway

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    1 out of 1 members liked this post. Yes Reputation No
    From what I understand you don't actually calibrate the injectors, you enter tolerance numbers stamped on each injector to the ECM so it can compensate for small differences between injectors. Looks pretty simple to do, but I'm 99% sure it can't be done with a BT tool. Pretty sure you need autologic or equivalent.

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    Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
    Apparently DI is different. Maybe to have to calibrate each one to the HPFP position, considering it is cam driven? Hopefully someone here has more knowledge. I'm sure if there was a detailed DIY many people would be capable of performing it themselves. It's not like every BMW tech that does injectors on an N54 is a rocket scientist.

    It is nice to just pay somebody to do it, but I'd rather learn myself.

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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    I replaced my #6 injector @ VAC. They had to get a file from europe to code it, but they did and it worked, so its not only BMW that can do it Click here to enlarge CANNOT do it with BT though.. not yet anyway
    any info as to how they did it?

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    pulled from n54tech

    Just got my 2008 E93 335i back after they finally did this SIB, that I had to show dealer first. It is running better than it has in a while. Knock on wood

    13 04 09 Cold Start rough running with misfire faults

    SUBJECT
    N54 - Cold Start Rough Running with Misfire Faults


    MODEL
    E82, E88, E90, E92, E93, E60, E61 with N54 engine


    SITUATION
    The customer may complain that during the cold start in the morning, the engine runs very roughly and the Service
    Engine Soon lamp is illuminated.

    Various misfire fault codes (e.g., 29CC, 29D2, 29D1, 29D0, 29C0, 29CF) may be stored in the DME control
    module.

    The engine rough running complaint can be reproduced on a cold start in the workshop. During the course of
    diagnosis, the spark plugs, removed from the misfiring cylinders after the problem was reproduced, are found to
    be soaked ("wet") with fuel, while the injector tips are covered with a layer of carbon deposit.

    CAUSE
    Possible cause: high pressure injector failure (leakage or incorrect spraying pattern), due to internal wear or
    unfavorable stack of tolerances

    CORRECTION
    In case of a reproducible "cold start" rough engine running with corresponding misfire faults, replace the high
    pressure injector of the affected cylinder, using the improved part (P/N 13 53 7 585 261). Follow TIS Repair
    Instruction RA 13 53 310 for injector removal and installation. If the spark plug from the misfiring cylinder shows
    wetness (fuel soaking) after cold start removal, then it should be replaced as well.

    After an injector replacement, perform the individual injector calibration (adjustment) with the DME control module,
    as per SI B12 26 08.

    IMPORTANT:

    If during a cold start rough engine running, the misfire faults are stored in more than one cylinder of the same
    bank, all three injectors from that bank need to be replaced.

    In case the misfire faults are stored on three (or more) cylinders, then the complete set of injectors (6) needs to be
    installed.

    IMPORTANT NOTE:

    For N54 misfire fault complaints during normal engine operation (misfire faults not related to the engine's "cold
    start"), refer to the following Service bulletins:

    B12 05 09 - N54 (E6x) Misfire Faults due to DME Software Error

    B12 06 09 - N54 (E9x) Misfire Faults due to DME Software Error

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    It is a DME calibration to each injector, not the other way.

    What diag/reflash tool is not noted, but...
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    so they use a "DME contol module" what ever that means...sound like it might be something the BT might be able to do in the future?

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    Click here to enlarge Originally Posted by alpinedevil335 Click here to enlarge
    any info as to how they did it?
    not sure, call and ask, i was getting turbo's replaced at the time and wasnt paying attention to the smaller details Click here to enlarge

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    the DME is the ECM, the ECU the engine BRAIN, if you will...

    DME

    http://en.wikipedia.org/wiki/Digital_Motor_Electronics
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    Click here to enlarge Originally Posted by milkt Click here to enlarge
    the DME is the ECM, the ECU the engine BRAIN, if you will...

    DME

    http://en.wikipedia.org/wiki/Digital_Motor_Electronics
    What are you bringing this up in reference to?

    In the automotive industry, DME is often referred to as the Engine Control Unit (ECU)
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  21. #21
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    i know what the DME is...i understood it wrong. thought they were reffering to the tool they used to do it

    Click here to enlarge Originally Posted by milkt Click here to enlarge
    the DME is the ECM, the ECU the engine BRAIN, if you will...

    DME

    http://en.wikipedia.org/wiki/Digital_Motor_Electronics

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    Click here to enlarge Originally Posted by alpinedevil335 Click here to enlarge
    so they use a "DME contol module" what ever that means...sound like it might be something the BT might be able to do in the future?
    This comment... "what ever that means"
    I thought I'd offer a small read.

    Click here to enlarge Originally Posted by alpinedevil335 Click here to enlarge
    i know what the DME is...i understood it wrong. thought they were reffering to the tool they used to do it
    Oh, OK

    Anyway, I guess each injector has some specific LINK to the DME.
    Pretty cool stuff.
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    I think I can relate to how AlpineD feels. I've had my car for about 8 months and have had the injectors and HPFP go out already. I bet most of us that plan on keeping the car for a long time wouldn't think twice about spending money on a solid upgraded fuel system. This may end up never happening? Who knows, and if it does, maybe it will be HPF and you will need to apply KY as you install it. Be that as it may...It would be great if we could end up ordering injectors etc. and plopping them in ourself correctly. Having a heavily modified car with a warranty that will be voided before I round the corner into the dealers lot sucks. I would rather have a cost effective answer to the most commonly encountered problems. I know that you can take the mods off etc., but, if you work a lot, and try and do other hobbies, stripping mods on and off routinely can wreck your sunny outlook.

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    my question is, what is so different about getting larger injectors made compared to say a DI Duramax or a Cummins Diesel? Both are operating on the same principles...and there is a huge aftermarket for different nozzles/larger injectors for the diesel community...are the BMW injectors just too sensitive and fragile to support such work?

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    Click here to enlarge Originally Posted by Matt@Camber-Toe Click here to enlarge
    my question is, what is so different about getting larger injectors made compared to say a DI Duramax or a Cummins Diesel? Both are operating on the same principles...and there is a huge aftermarket for different nozzles/larger injectors for the diesel community...are the BMW injectors just too sensitive and fragile to support such work?
    You are correct, they are operating on the same principles. I went over this with unfor and asked him about using diesel injectors on his application but I forget what the reasoning was against it. I'll ask him to chime in.
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