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Discussion Starter · #3 ·
Here is a link on a diy to coding injectors for our N54 engines. You will need to have INPA software and a d-can cable to do the coding. http://www.bimmerboost.com/showthread.php?20330-DIY-N54-Injector-Coding-Via-INPA

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The reason why I'm asking, is because I found a shop that can replace them for me at a cheap price..I told him about coding them after, he said he has never heard of coding injectors

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I have read BMW shop reports of "calibrating" injectors on the 535i after replacement. My theory (and I do not know this for sure..) is that normal injectors do not have to be coded for, however, high pressure/direct injection injectors do need to be coded for (or calibrated for really)

You should also keep in mind that BMW changed the injectors at some point, and if you have the old ones you can't just change one to a new one. You have to replace the whole set. If you do some searching I'm sure you'll find more info. I don't know the part numbers off hand
 

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I honestly thought audi's were overengineered untill i bought this E60 5 series. That's absolutely absurd that you have to code a fuel injector after replacement. Just another reason you have to get things done at the dealer, for most people. Yikes.
 

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I honestly thought audi's were overengineered untill i bought this E60 5 series. That's absolutely absurd that you have to code a fuel injector after replacement. Just another reason you have to get things done at the dealer, for most people. Yikes.
meh, the car does it, you just have to tell it to do it. Not a big deal.

I bet it's more common than you'd think on the direct injection systems
 

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You need the coding so the dme knows what each injector flow rating is since each one has different flow performance. This is to ensure that you have enough fuel in the chamber especially when your turbos are spooling up and in wot situations. You don't want your afr's to be all messed up.


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You need the coding so the dme knows what each injector flow rating is since each one has different flow performance. This is to ensure that you have enough fuel in the chamber especially when your turbos are spooling up and in wot situations. You don't want your afr's to be all messed up.

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That almost makes sense, but fuel injectors are either low or high resistance and they should all flow at the same rate otherwise you'd have different cylinder combustions.
370cc 550cc 750cc whatever the flow might be, it is all the same across all 6 or 8 cylinders for each injector.

BMW is not the only comapny with direct injection, i just personally think it's a little overdone.lol
 

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Discussion Starter · #9 ·
I have read BMW shop reports of "calibrating" injectors on the 535i after replacement. My theory (and I do not know this for sure..) is that normal injectors do not have to be coded for, however, high pressure/direct injection injectors do need to be coded for (or calibrated for really)

You should also keep in mind that BMW changed the injectors at some point, and if you have the old ones you can't just change one to a new one. You have to replace the whole set. If you do some searching I'm sure you'll find more info. I don't know the part numbers off hand
I'm sure I have the old version of injectors..if I can find them, I will replace the 3 I need..if I don't find them, I guess I'm screwed lol..but the guy at the shops isn't know what I was talking about when I mentioned about coding them

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I have read BMW shop reports of "calibrating" injectors on the 535i after replacement. My theory (and I do not know this for sure..) is that normal injectors do not have to be coded for, however, high pressure/direct injection injectors do need to be coded for (or calibrated for really)

You should also keep in mind that BMW changed the injectors at some point, and if you have the old ones you can't just change one to a new one. You have to replace the whole set. If you do some searching I'm sure you'll find more info. I don't know the part numbers off hand
That's probably a good reason to have it coded, that would make sense that it needs to be calibrated or tested before the engine is turned on.
 

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The more I think about it, the more I think it makes sense for direct injection.

I've always been told that the orifices in DI injectors are TINY compared to "regular" ones. I would imagine tolerances on something this small are insane, to the point that even the smallest manufacturing variation is going to cause some differences in how they actually work. Thus, there's your reason for having to calibrate them.

For regular port injection system injectors, a super small change in tolerances may not make much of a difference, thus the ability to lump them all under the same "map" so to speak.
 

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That almost makes sense, but fuel injectors are either low or high resistance and they should all flow at the same rate otherwise you'd have different cylinder combustions.
These injectors are not just on or off. And they don't all flow at the exact same rate which is why the computer needs to know the exact calibration specs for each one.
 

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Discussion Starter · #13 ·

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Is there any possible way to find the old version injectors online?

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I am not sure but you will have to probably try a few places since they stop making these injectors, p/n13537585261, a few months ago.

The more I think about it, the more I think it makes sense for direct injection.

I've always been told that the orifices in DI injectors are TINY compared to "regular" ones. I would imagine tolerances on something this small are insane, to the point that even the smallest manufacturing variation is going to cause some differences in how they actually work. Thus, there's your reason for having to calibrate them.

For regular port injection system injectors, a super small change in tolerances may not make much of a difference, thus the ability to lump them all under the same "map" so to speak.
The coding is needed for the engine to run properly right after injector replacement. Due to the piezo design each injector has different power and flow rates. To ensure the engine does not run lean or rich due to the variations in fuel flow you code the DME with the values of each injector in it's corresponding location. Without the coding you are hoping the DME is able to figure out which injector is causing a lean or rich environment when the exhaust hits the lambda sensor, which I am sure it will eventually. Until it does you are either burning too much gas or not enough. These engines are temperamental at times but man when they are tuned right they are so much fun.
 

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Discussion Starter · #15 ·
I am not sure but you will have to probably try a few places since they stop making these injectors, p/n13537585261, a few months ago.

The coding is needed for the engine to run properly right after injector replacement. Due to the piezo design each injector has different power and flow rates. To ensure the engine does not run lean or rich due to the variations in fuel flow you code the DME with the values of each injector in it's corresponding location. Without the coding you are hoping the DME is able to figure out which injector is causing a lean or rich environment when the exhaust hits the lambda sensor, which I am sure it will eventually. Until it does you are either burning too much gas or not enough. These engines are temperamental at times but man when they are tuned right they are so much fun.
Gotcha!! Btw I found a site that have them in stock for $170.97 each
http://http://www.new-part.com/product/bmw-f01-e60-e82-e90-fuel-injector-genuine-13-53-7-585-261

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Discussion Starter · #16 ·
Here is a link on a diy to coding injectors for our N54 engines. You will need to have INPA software and a d-can cable to do the coding. http://www.bimmerboost.com/showthread.php?20330-DIY-N54-Injector-Coding-Via-INPA

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How effective is this bro? Imma have a shop replace them, but they don't know how to code them..so I need to know how effective is this, so I don't end up in the dealership coding them...thnx for the help in advance

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How effective is this bro? Imma have a shop replace them, but they don't know how to code them..so I need to know how effective is this, so I don't end up in the dealership coding them...thnx for the help in advance

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It's the same thing the dealership does (albeit probably a different program, but ultimately it tells the car to do the same thing the dealership would tell it to do, so there's no difference)
 

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Discussion Starter · #18 ·
It's the same thing the dealership does (albeit probably a different program, but ultimately it tells the car to do the same thing the dealership would tell it to do, so there's no difference)
Cool..one other question..do I need to know any injector info or would the program do it itself once its plugged into the car? Info as far as any codes or numbers on the injectors itself

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Hey, I replaced the injectors on my 2011 BMW X5 Diesel with a set of nice and clean used ones. How do I know the value of each injector so I can enter in the program.

Also, by not calibrating them can give me a U0100 OBD code???

My car is reading that code. I sent the DDE, CAS and key to Bimmer Life in TX to update my software and to make sure the modules were communicating with each other. The bench test come back perfect but my car still not starting and having the same code.

Please advice
 

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I believe this old thread is all about the gas N54 engine where the injectors do have two 3-digit numbers on them that have to be coded into the car. I have no idea if the diesel's need this as well (I would presume they do).

Here's the numbers on an N54 injector.

 
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