Fuel injector replacement, does it needs to be reprogram?

[e85m4]

I have replaced one of my fuel injector and now the car drives like crap i have a fuel cut at around 3800rpm when going full throttle...

So my question is; does the new injector needs to be coded/calibrated for the car to run properly and equaly with all other injectors?

-MK

[e85m4]

Anyone before i go out and spend money into this tomorrow?

[hellokitty]

If it’s anything like past BMW generations (E9X), then yes.

[e85m4]

Originally Posted by hellokitty

If it’s anything like past BMW generations (E9X), then yes.

Thats what i was thinking but someone on the BM3 FB page told me they dont have to be claibrated so its a little confusing

[e85m4]

Nobody knows the exact answer to this?

[heckyeahbro69]

Originally Posted by e85m4

Nobody knows the exact answer to this?

Yes, the injector value needs to be input into the dme with a service function in ista-d. The car will run without it though. Why did you replace the injector in the first place?

[e85m4]

Originally Posted by Remonster

Direct fuel injectors need to be coded, the injector has a code written on it that corresponds with that exact injector's spray pattern & flow rate when it was bench tested at the factory. The DME needs to know this code so that it can properly scale the injector, otherwise you'll have too much or too little fuel injected compared to how much the DME thinks it is injecting since the DME will still be using the code from the previous injector.

You also need to make sure to replace all the seals on ALL injectors on the fuel rail when you take it out to replace one injector, re-using seals on the injectors that you are not replacing will almost always cause misfires and poor running in my experience. I've had several cars come into my shop after someone else replaced a direct fuel injector with misfire, rough running, etc. that was cured simply by replacing all fuel injector seals.

The thing is that i bought a bosch injector from ebay same part number as the oem injector and car runs like crap and goes into limp mode at 4k !!

Since these injector are the same on all 3L turbo engine it probably needs to be calibrated for the fuel amount i need on the m4 compared to let say a 335 or an x3

[e85m4]

Originally Posted by heckyeahbro69

Yes, the injector value needs to be input into the dme with a service function in ista-d. The car will run without it though. Why did you replace the injector in the first place?

The injector was bad and causing a lot of misfire on cylinder 4 so i have replaced it

[cookiesowns]

Originally Posted by Remonster

You're not understanding, the part number describes the type of injector your car needs but every single injector that is made has its own unique code written on it. You will need to pull the new injector out to read its code, have that code programmed into your DME, and make sure to replace all fuel injector seals when putting them all back into the engine.

Incorrect. EU6 motors like the S55, or newer N55's does not need it to be coded. Anyone who has coded it did not follow the procedures. ISTA-D clearly states EU6 cars do not need injector to be coded. You use the basevalue that was pre-programmed in the car, and the DME does the rest.

[Remonster]

Originally Posted by cookiesowns

Incorrect. EU6 motors like the S55, or newer N55's does not need it to be coded. Anyone who has coded it did not follow the procedures. ISTA-D clearly states EU6 cars do not need injector to be coded. You use the basevalue that was pre-programmed in the car, and the DME does the rest.

Really? That's interesting. If that's the case I will delete my post to make sure nobody follows incorrect info but do you have the ability to share the procedure for future reference? I have not done S55 injector replacement yet, thankfully.

[cookiesowns]

Originally Posted by Remonster

Really? That's interesting. If that's the case I will delete my post to make sure nobody follows incorrect info but do you have the ability to share the procedure for future reference? I have not done S55 injector replacement yet, thankfully.

It's in ISTA. Just look it up.

[Haveyouseenjay]

probably a dumb question....

I came across having to replace my injector(s) as well and found out about it needed to be coded in. besides that, I also seen, EU5 and EU6 injectors both said would fit my 320i n20 (FCPeuro).... I've been looking everywhere as to how can I find out which one is for my car...

appreciate the help!

[tom @ eas]

Originally Posted by e85m4

Thats what i was thinking but someone on the BM3 FB page told me they dont have to be claibrated so its a little confusing

What they're likely referring to is if the index numbers match on the injectors (original and replacement), you can get by without programming.

[Haveyouseenjay]

Originally Posted by tom @ eas

What they're likely referring to is if the index numbers match on the injectors (original and replacement), you can get by without programming.

Originally Posted by tom @ eas

What they're likely referring to is if the index numbers match on the injectors (original and replacement), you can get by without programming.

Assuming you get the $300 something from BMW as a-pose to getting the OE from Bosch.

[JSealz_F82]

So to confirm, I do not need to do anything other than install the new OEM BMW injector + seals.

[andrei.m4]

S55 injectors have same code on them old vs new 215 if i remember corectly, no coding neded.

[pdog37]

so what did you end up doing to fix the issue..im having the same issue