Do Bosch EU6 injectors need to be coded?

pablowbr · 01-27-2021, 05:24 PM

Had one of my injectors clog open for the second time and so I replaced all with Bosch EU6 injectors and replaced my plugs caused they were burned. The shop says the car isles smoother but runs rough at lower rpms and they think it needs to be brought to BMW to code the injectors. Is this true? Do the injectors need to be coded? Or will the "roughness" smooth out over time?

TopJimmy · 01-27-2021, 05:41 PM

Yes, you should have checked the number on the injectors and coded them in (or saw the same #). Luckily I don't think that's your issue. If it is you need to pull the injectors back out to see the flow number. Since your car runs smoother let's check the easier things first...

Could be that your one plug is fouled (dried fuel coating). Could also be a fouled O2 sensor.

First check, logs:
Are bank 1 and 2 lambda same at idle? Same at driveway rev to 2K? If different then the O2 sensor may be fouled. Go for a good drive and cook it clean.

Second check, logs:
If lambdas same look at timing driving a moderate 2K-5K pull. If one plug shows timing off it's fouled, especially if it was the cylinder with stuck injectors.

I learned the hard way to install new plugs when doing any injector work, it's $75 not to risk pulling it all apart again... FCPEuro makes it almost free with their parts swap.

pablowbr · 01-27-2021, 05:53 PM

Quote:

Originally Posted by TopJimmy

Yes, you should have checked the number on the injectors and coded them in (or saw the same #). Luckily I don't think that's your issue. If it is you need to pull the injectors back out to see the flow number. Since your car runs smoother let's check the easier things first...

Could be that your one plug is fouled (dried fuel coating). Could also be a fouled O2 sensor.

First check, logs:
Are bank 1 and 2 lambda same at idle? Same at driveway rev to 2K? If different then the O2 sensor may be fouled. Go for a good drive and cook it clean.

Second check, logs:
If lambdas same look at timing driving a moderate 2K-5K pull. If one plug shows timing off it's fouled, especially if it was the cylinder with stuck injectors.

I learned the hard way to install new plugs when doing any injector work, it's $75 not to risk pulling it all apart again... FCPEuro makes it almost free with their parts swap.

Hey man thanks for the info. I actually just messaged you regarding the issue haha.
I forgot to mention that I did also replace all plugs. Is the only culprit my O2 sensor then? the car was running a little weird prior to the injector failure (twitchy throttle, weird rpm behavior...). So the car also has to be brought to BMW to be coded then...

TopJimmy · 01-27-2021, 06:21 PM

Quote:

Originally Posted by pablowbr

Quote:

Originally Posted by TopJimmy

Yes, you should have checked the number on the injectors and coded them in (or saw the same #). Luckily I don't think that's your issue. If it is you need to pull the injectors back out to see the flow number. Since your car runs smoother let's check the easier things first...

Could be that your one plug is fouled (dried fuel coating). Could also be a fouled O2 sensor.

First check, logs:
Are bank 1 and 2 lambda same at idle? Same at driveway rev to 2K? If different then the O2 sensor may be fouled. Go for a good drive and cook it clean.

Second check, logs:
If lambdas same look at timing driving a moderate 2K-5K pull. If one plug shows timing off it's fouled, especially if it was the cylinder with stuck injectors.

I learned the hard way to install new plugs when doing any injector work, it's $75 not to risk pulling it all apart again... FCPEuro makes it almost free with their parts swap.

Hey man thanks for the info. I actually just messaged you regarding the issue haha.
I forgot to mention that I did also replace all plugs. Is the only culprit my O2 sensor then? the car was running a little weird prior to the injector failure (twitchy throttle, weird rpm behavior...). So the car also has to be brought to BMW to be coded then...

Just go for a good drive to see if it clears up. That worked for me.

You can also re-flash your tune and reset adaptations to make sure the computer isn't trying to compensate. If the drive doesn't clear things up try this and then drive again.

pablowbr · 01-27-2021, 06:56 PM

Quote:

Originally Posted by TopJimmy

Quote:

Originally Posted by pablowbr

Quote:

Originally Posted by TopJimmy

Yes, you should have checked the number on the injectors and coded them in (or saw the same #). Luckily I don't think that's your issue. If it is you need to pull the injectors back out to see the flow number. Since your car runs smoother let's check the easier things first...

Could be that your one plug is fouled (dried fuel coating). Could also be a fouled O2 sensor.

First check, logs:
Are bank 1 and 2 lambda same at idle? Same at driveway rev to 2K? If different then the O2 sensor may be fouled. Go for a good drive and cook it clean.

Second check, logs:
If lambdas same look at timing driving a moderate 2K-5K pull. If one plug shows timing off it's fouled, especially if it was the cylinder with stuck injectors.

I learned the hard way to install new plugs when doing any injector work, it's $75 not to risk pulling it all apart again... FCPEuro makes it almost free with their parts swap.

Hey man thanks for the info. I actually just messaged you regarding the issue haha.
I forgot to mention that I did also replace all plugs. Is the only culprit my O2 sensor then? the car was running a little weird prior to the injector failure (twitchy throttle, weird rpm behavior...). So the car also has to be brought to BMW to be coded then...

Just go for a good drive to see if it clears up. That worked for me.

You can also re-flash your tune and reset adaptations to make sure the computer isn't trying to compensate. If the drive doesn't clear things up try this and then drive again.

That has to be done after the injectors are coded right? I have to first bring the car to BMW to code them and then I drive it?

Commanderwiggin · 01-27-2021, 07:43 PM

EU6 Injectors do not need to be coded...but they do need the small mixture adaptations reset as per BMW TIS document "13 53 719 Removing and installing_replacing all injectors (S55)"

pablowbr · 01-27-2021, 07:59 PM

Quote:

Originally Posted by Commanderwiggin

EU6 Injectors do not need to be coded...but they do need the small mixture adaptations reset as per BMW TIS document "13 53 719 Removing and installing_replacing all injectors (S55)"

Man I've been researching this and everyone is saying different things... so you're saying all I need to do is reset adaptations?

TopJimmy · 01-27-2021, 08:23 PM

I was told that as long as you check that every little number matches on the old and new injector you're okay...especially the 3 digit number closest to the plug (supposedly a flow number). I don't know this for sure. I swapped 1 Bosch injector and it was an exact match for OEM on all digits, just no BMW propeller logo.

m4AY · 01-27-2021, 11:48 PM

When you replace an injector there is a 3 digit index number on it. This value is entered into the dme via ista, and the old number is erased. If you replaced all 6, then you enter in each 3 digit number for each injector. Dme saves it. Then you reset all adaptations. Then you shut the car off, lock the car and wait for the little 4 way triangle 🔺️ light to shut off, car is asleep. Now start it and idle it, drive it. This is what we do at a bmw dealership when replacing any injectors

Commanderwiggin · 01-28-2021, 03:01 AM

Quote:

Originally Posted by m4AY

When you replace an injector there is a 3 digit index number on it. This value is entered into the dme via ista, and the old number is erased. If you replaced all 6, then you enter in each 3 digit number for each injector. Dme saves it. Then you reset all adaptations. Then you shut the car off, lock the car and wait for the little 4 way triangle 🔺️ light to shut off, car is asleep. Now start it and idle it, drive it. This is what we do at a bmw dealership when replacing any injectors

Well you're doing an extra, unnecessary step then for the S55.

As per the technical training manual: "For injectors and a DME which supports the CVO function, the injection quantity compensation during the replacement of one of the components is deleted."

As mentioned before, EU6 injectors do not need to be coded. ISTA small mixture adaptation reset is required.

m4AY · 01-28-2021, 09:07 AM

Quote:

Originally Posted by Commanderwiggin

Well you're doing an extra, unnecessary step then for the S55.

As per the technical training manual: "For injectors and a DME which supports the CVO function, the injection quantity compensation during the replacement of one of the components is deleted."

As mentioned before, EU6 injectors do not need to be coded. ISTA small mixture adaptation reset is required.

%100 correct, eu5 has to be indexed, the eu6 which is our s55 Do Not!
Just reset adaptations

AlpineF80 · 01-28-2021, 07:15 PM

Resetting the adaptations is a must per BMW instruction.

pablowbr · 01-28-2021, 09:47 PM

So the shop had the injectors coded and reset adaptations and apparently that made the roughness at low rpms go away... so still unsure if they need to be coded or not lol

papasmurf_m3 · 01-29-2021, 02:09 AM

I swapped my injectors and didn't reset immediately after but, I didn't drive it much and got the adaptations reset.

Commanderwiggin · 01-29-2021, 11:07 AM

Quote:

Originally Posted by pablowbr

So the shop had the injectors coded and reset adaptations and apparently that made the roughness at low rpms go away... so still unsure if they need to be coded or not lol

They do not need to be coded.

TopJimmy · 01-29-2021, 04:52 PM

Quote:

Originally Posted by pablowbr

so still unsure if they need to be coded or not lol

Commander knows. If he says you're good...you're good.

pablowbr · 01-30-2021, 09:04 AM

Quote:

Originally Posted by Commanderwiggin

Quote:

Originally Posted by pablowbr

So the shop had the injectors coded and reset adaptations and apparently that made the roughness at low rpms go away... so still unsure if they need to be coded or not lol

They do not need to be coded.

Would the idle just have returned to normal after driving it for a while then? Is that the normal procedure after installing injectors?

Commanderwiggin · 01-30-2021, 09:44 AM

Quote:

Originally Posted by pablowbr

Quote:

Originally Posted by Commanderwiggin

Quote:

Originally Posted by pablowbr

So the shop had the injectors coded and reset adaptations and apparently that made the roughness at low rpms go away... so still unsure if they need to be coded or not lol

They do not need to be coded.

Would the idle just have returned to normal after driving it for a while then? Is that the normal procedure after installing injectors?

You do need to have the small mixture adaptation reset performed.

ckendri · 01-30-2021, 09:31 PM

Quote:

Originally Posted by Commanderwiggin

Quote:

Originally Posted by pablowbr

Quote:

Originally Posted by Commanderwiggin

Quote:

Originally Posted by pablowbr

So the shop had the injectors coded and reset adaptations and apparently that made the roughness at low rpms go away... so still unsure if they need to be coded or not lol

They do not need to be coded.

Would the idle just have returned to normal after driving it for a while then? Is that the normal procedure after installing injectors?

You do need to have the small mixture adaptation reset performed.

Is this the same as resetting adaptations through BM3? Thanks.

landonvan · 01-30-2021, 09:41 PM

What does changing to these injectors accomplish. These are the M5 injectors correct.

HyeM3 · 01-31-2021, 03:04 AM

Quote:

Originally Posted by landonvan

What does changing to these injectors accomplish. These are the M5 injectors correct.

M5 injectors are the EU5 ones. EU6 injectors are the stock ones for the S55. Bosch is the company that makes the stock injectors so OP bought the original injectors just without the BMW logo stamped on them so it saved him a good amount of money

TopJimmy · 01-31-2021, 08:47 AM

Quote:

Originally Posted by landonvan

What does changing to these injectors accomplish. These are the M5 injectors correct.

OP just replaced a BMW injector with Bosch, same EU level.

Commander advised on resetting adaptations (BM3), and also the small mixture adaptation (ISTA). He said these injectors do not need to be "coded in".

01-27-2021, 05:24 PM	#1
pablowbr Enlisted Member 10 Rep 39 Posts Drives: F82 M4 Join Date: Mar 2019 Location: Charlottesville iTrader: (0)	Do Bosch EU6 injectors need to be coded? Had one of my injectors clog open for the second time and so I replaced all with Bosch EU6 injectors and replaced my plugs caused they were burned. The shop says the car isles smoother but runs rough at lower rpms and they think it needs to be brought to BMW to code the injectors. Is this true? Do the injectors need to be coded? Or will the "roughness" smooth out over time?
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01-27-2021, 05:41 PM	#2
TopJimmy Major General 5450 Rep 5,143 Posts Drives: 2023 M3 Comp xDrive Join Date: Jul 2019 Location: Chester County, PA iTrader: (5)	Yes, you should have checked the number on the injectors and coded them in (or saw the same #). Luckily I don't think that's your issue. If it is you need to pull the injectors back out to see the flow number. Since your car runs smoother let's check the easier things first... Could be that your one plug is fouled (dried fuel coating). Could also be a fouled O2 sensor. First check, logs: Are bank 1 and 2 lambda same at idle? Same at driveway rev to 2K? If different then the O2 sensor may be fouled. Go for a good drive and cook it clean. Second check, logs: If lambdas same look at timing driving a moderate 2K-5K pull. If one plug shows timing off it's fouled, especially if it was the cylinder with stuck injectors. I learned the hard way to install new plugs when doing any injector work, it's $75 not to risk pulling it all apart again... FCPEuro makes it almost free with their parts swap. __________________ '18 F80 Base 6MT \| '19 F82 Exec DCT \| '18 F82 Comp Exec DCT \| '23 G80cx
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01-27-2021, 07:43 PM	#6
Commanderwiggin Major 2049 Rep 1,200 Posts Drives: M2C - X3M - Turbo E46 M3 - 45E Join Date: Mar 2014 Location: SOCAL iTrader: (2)	EU6 Injectors do not need to be coded...but they do need the small mixture adaptations reset as per BMW TIS document "13 53 719 Removing and installing_replacing all injectors (S55)" __________________ 575RWHP F87 M2C - ECUTEK RACEROM with flex fuel tuning by Bend Calibration 1000+RWHP E46 M3, Lab22 Built Turbo S54, Bend Calibration Tuned - BMW Half Mile Record Holder
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01-27-2021, 08:23 PM	#8
TopJimmy Major General 5450 Rep 5,143 Posts Drives: 2023 M3 Comp xDrive Join Date: Jul 2019 Location: Chester County, PA iTrader: (5)	I was told that as long as you check that every little number matches on the old and new injector you're okay...especially the 3 digit number closest to the plug (supposedly a flow number). I don't know this for sure. I swapped 1 Bosch injector and it was an exact match for OEM on all digits, just no BMW propeller logo. __________________ '18 F80 Base 6MT \| '19 F82 Exec DCT \| '18 F82 Comp Exec DCT \| '23 G80cx
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01-27-2021, 11:48 PM	#9
m4AY Private 36 Rep 88 Posts Drives: 2013 x5m, 2005 x5 4.8is Join Date: Dec 2017 Location: edmonton alberta iTrader: (0)	When you replace an injector there is a 3 digit index number on it. This value is entered into the dme via ista, and the old number is erased. If you replaced all 6, then you enter in each 3 digit number for each injector. Dme saves it. Then you reset all adaptations. Then you shut the car off, lock the car and wait for the little 4 way triangle 🔺️ light to shut off, car is asleep. Now start it and idle it, drive it. This is what we do at a bmw dealership when replacing any injectors
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01-28-2021, 07:15 PM	#12
AlpineF80 Enlisted Member 17 Rep 32 Posts Drives: BMW F80 M3 Join Date: Jan 2021 Location: Illinois iTrader: (0)	Resetting the adaptations is a must per BMW instruction. __________________ 2015 BMW F80 M3 DCT \| PETuned Stage 2E85 . Performance Eurowerks 3.5" Downpipe & Silicone Chargepipe . RK Autowerks 4-pin Crankhub . BMW FlexFuel Spark Plugs Instagram . Build Thread
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01-28-2021, 09:47 PM	#13
pablowbr Enlisted Member 10 Rep 39 Posts Drives: F82 M4 Join Date: Mar 2019 Location: Charlottesville iTrader: (0)	So the shop had the injectors coded and reset adaptations and apparently that made the roughness at low rpms go away... so still unsure if they need to be coded or not lol
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01-29-2021, 02:09 AM	#14
papasmurf_m3 Captain 455 Rep 844 Posts Drives: YMB F80 M3 Join Date: Apr 2019 Location: LA iTrader: (0)	I swapped my injectors and didn't reset immediately after but, I didn't drive it much and got the adaptations reset. __________________ 60-130 mph 6.72 secs 1/2 mile trap speed 158 mph ecutek - bend calibration pro tune - flex fuel - mpe - stock turbos - oem+
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01-30-2021, 09:41 PM	#20
landonvan Private First Class 72 Rep 177 Posts Drives: 2015 f80 M3 Join Date: Oct 2011 Location: Fredericksburg VA iTrader: (1) Garage List 2009 E92 M3 [10.00]	What does changing to these injectors accomplish. These are the M5 injectors correct.
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