BMW N43 injectors replacement and coding

[@allmech_BMW_fault_finding]

Never seen em pulled out like that. Clever.

[@Telstar_1]

Hi thanks for the video. I have a code for injector / misfire cylinder 3 on my N43 318i and considering steps. BMW dealership quoted £479 + £140 fitting per Index 12 injector, so replacement of all is probably uneconomical. Did replacing all 4 injectors finally resolve your rough running / misfires? I may attempt to remove and clean tips and replace seals, otherwise next replace the faulty injector with used and hope that works. Thanks.

[@CosminRotaru]

Hi! Yes it did. If your injectors are pre index 11 it might be that you won't get it properly fixed with changing just one injector. But start easy with changing the spark plugs first. You can try swapping around spark plugs/ coils. Even injectors (but you will have to code them as you swap them.

[@Telstar_1]

@@CosminRotaru Thanks, yes I should’ve mentioned I have already replaced all coils and plugs with some temporary improvement. More recently I replaced the low pressure fuel sensor, and a faulty NOx sensor with a used part and fault has cleared. The cylinder 3 injector misfire fault is now showing with heavy engine shake and engine light worse than before.

[@CosminRotaru]

@Telstar_1 i had nox sensor errors as well. But i started with fixing the misfires issue (injectors) suspecting that improper burning might have fouled the sensor. I guess i was right as the nox sensor is no longer complaining.

[@Telstar_1]

@@CosminRotaru What’s the easiest way to get hold of the coding software package and laptop connection?

[@CosminRotaru]

I don't have an easy answer for that. Actually, easiest would be to find someone with the tools and experience...

[@byPana]

felicitari pentru tutorial !

[@billybanter9573]

This video is amazing> Thank you Cosmin

[@SMega]

What are you doing at 19:38 when it says switch off terminal 15 and terminal R?

[@CosminRotaru]

Hi! Remove the key...

[@slengoslengaw8510]

Hi mate, thanks for sharing the video. Do you think just deleting and resetting the adaptation is enough? Or would I need to take it for the drive sequence you mentioned by bimmer forum? Can you share me the link for that just to have a read through?

[@CosminRotaru]

Hi! I am not a professional, so i cannot say for sure, but I would find it logical that the ECU will rebuild all those adaptations in time. But it probably takes a lot of time this way. You will find a lot of good information on bimmerprofs.com/

[@slengoslengaw8510]

@@CosminRotaru I’ve managed to see bmw instructions on this and when changing/replacing injectors, you only need to carry out injector quantity compensation. Adaptations are not to be deleted for such change. Adaptations are to be reset for things like new ecu or new engine..

[@CosminRotaru]

@@slengoslengaw8510​​⁠The ecu will adjust injectors flow through their life. As much as possible. At some point there is no room for adjustments and other adjustments will be made (like long term fuel trims to correct for rich fuel mixture, for example). Then you would have misfires, fuel in oil in case of leaking injectors. That's why i think is not a bad advice to reset adaptations. I guess on their minds bmw think you'd replace injectors proactivity, before they fail and mess up the whole system...

[@oskarisaunisto5817]

What is the spanner size of injector fuel rails? 12 mm?

[@ams0876]

14

[@heems004]

Hello, did you discover why fuel rail pressure drops after turning off the car, even after replacing all injectors?

[@CosminRotaru]

Hi! No... Some say is normal 🤷‍♂️ The engine runs fine now, so I moved on 😁

[@heems004]

@@CosminRotaru I have similiar issue. 0 missfire, but my fuel rail pressure drops after turning off the car. I am worrying about my injectors. I don't have more issue excpect this above.

[@mohamedstes5800]

Could the reason for still having a drop in pressure be the one-use injector rail that you didnt replace in this video?

[@CosminRotaru]

Hi! I didn't notice and leak in that area. I also got the info that is normal for the pressure to drop on these high pressure systems .... IDK.

[@EpixxRSProductions]

Hi Cosmin, great video! What cable are you using to plug into your laptop? cheers

[@harpssingh1477]

is it better to use ISTA for coding Injectors, if so can i get it from ebay

[@jourd6]

Hello mate, where did you get your ISTA from? Looking to get my own copy

[@maqdoor]

I have the same problem rough ilde on cold start some time it stalls but 2-3 minutes makes it fine and it runs smooth . Cold start sometimes gives the error P0303 but it goes away automatically. I have replaced plugs so far maf cleaned, throtle body done but no effect. Is it an injector problem or coil??

[@246alfa]

You can check the spark plug, I even threw out the stand. You can also check the coil. The stand was dismantled, no matter what they asked. The injectors are easy to check.

[@246alfa]

But BMW still has this problem. when not the previous cylinder is sick. .If 1-3-4-2, then the error may be as follows. And the hydraulic shock is only on the latter through the inlet.

[@maqdoor]

@@246alfa how can I make sure that its not the injector? I had swapped the coils but the error remained with cylinder 3. When i replaced all the plugs they were all dry

[@CosminRotaru]

If you changed the plugs and swap the coils you should be looking into the injectors. I mean a compression/leak test could also reveal something bad on that cylinder, but these engines are prone to injector failure.

[@246alfa]

@@CosminRotaru А что мешает просто проверить форсунки? Отлить рад разных ревизий и забыть проблему?

[@nazihsouliman4689]

Hi 😊 my problem is it takes a long time to start hot while starting in the morning is normal, the car is e60 520i, do you think the injector cleaner solves the problem or is there another reason for it

[@abdelrahmanibrahim4470]

Hi Cosmin ! Great video you have a new subscribe ! I suffered from 2AAF (Fuel pump plausability) and 30DA (NOx sensor) + engine vibration at idle/cruising speed/accelerating. tried swapping fuel pump but it did not work (LPFP). used INPA and realized my LPFP is only 4.2 bar instead of 5 (fluctuating a lot in range of 0.2 bars, fuel rail pressure is 98-150 bars only instead of 200. only if I floor peddal it goes all the way to 200 bar (so probably the HPFP is working properly). And only when I clear èrror codes, I get misfires in bank 2. I now think one or both inkectors in bank 2 is leaking. does it all add up you think ?

[@CosminRotaru]

Hi! Thank you for subscribing! 🙂 I'm not a mechanic. I just like to learn new things and fix my own stuff. I suggest you read on bimmerprofs page. There's a lot of good info there and i think also on fuel pump and pressure and all that stuff. That's where i also learned about injectors. I don't think lfp would be low because of leaky injectors. But if the lpfp cannot provide proper pressure that would be an issue indeed. Search on the site i mentioned. It will help you 🙂

[@abdelrahmanibrahim4470]

@@CosminRotaru Thanks for your response ! in your video you coded all 4 cylinders although you only changed two injectors, is that always needed? I am planning on only swapping injectors 3,4 without dissembling 1,2 to know the numbers on them. also forgive my dumb question, cylider 1 i suppose is the one inside closer to the driver cabin and 4 is further most toward the kidney grill ? I m also curious to know if you investigated further and found a root cause

[@CosminRotaru]

@@abdelrahmanibrahim4470 hi! I actually replaced all injectors 🙂 I think I mentioned at the end of the video. I also think I mentioned the order of the injectors. I don’t remember right now…

[@paulmacheso9953]

@@CosminRotaru are you still using your car

[@CosminRotaru]

Yes. It's in the family 🙂

[@seabhreach]

Great video, have the same issue with the 2L version. Already tried all the cheaper fixes but miss fire in CL3 keeps returning. Got myself an Injector tester/cleaner so going to give that a try first but will def do the leak test now also. See you bought the BMW injector rather than a aftermarket part, they seems to be a lot cheaper, did you research and decide that was a bad idea?

[@CosminRotaru]

Hi! Yes i did. A lot of information on bimmerprofs. By original... What kind of injector tester/cleaner you got? These are high pressure injectors. Like 200bar.

[@seabhreach]

@CosminRotaru Supposed to actuate the injectors while you clean with carb cleaner. Not sure how effective they are..

[@CosminRotaru]

@@seabhreach it won't work for these injectors unfortunately...

[@seabhreach]

@@CosminRotaru wasn't expensive and was a long shot. Trying to verify it is actually the injectors before I spend the money. I'll try your trick to see if any are leaking. It's consistently CL3 and also running rich so suspect it's leaking.

[@seabhreach]

@@CosminRotaru thanks for the advice

[@BlackDesi-nt6pd]

I changed oil pump in changed oil filter housing I changed oil pressure sensor I changed oil solenoid valve still low oil pressure can you help me please

[@CosminRotaru]

Hi! I'm not a mechanic. Just a hobbyist that likes to maintain his own cars 🙂 If the oil pump is good, new OEM valve, correct oil viscosity... maybe it's not possible to create the pressure because of warn out crankshaft bearings... 🤷‍♂️

[@nikitasadovoy5082]

Did you replace only two injectors or all four? Is it possible to change several injectors and install different revisions?

[@CosminRotaru]

@@nikitasadovoy5082 hi. I have replaced all 4 injectors. If you buy new you will not find anything but index 11. I would not bother buying second hand.

[@nikitasadovoy5082]

@@CosminRotaru What if you change only those that are bad? if 2 will be 3 revisions and 2 new ones will be 11 revisions. Is it possible to use injectors of different revisions?

[@CosminRotaru]

@@nikitasadovoy5082you can give it a try. I did and it did not work for me. Not because you cannot mix revisions but because i had no way to proper test them. The ones that i hoped they are ok (as they were not leaking) were not good either (maybe clogged or with improper spray pattern). BTW: the old injectors were index 9.

[@246alfa]

Can

[@246alfa]

@@nikitasadovoy5082 Can

[@MartiansChronicle]

How is your engine running now? You get a lot more detail of what's happening with INPA. Is your NOx system working ok? Do you know if your car goes into Stratified Charge Mode? This mode is essential if you want the injectors to adapt properly.

[@CosminRotaru]

Hi! Yes, the engine runs normal now (with no misfires). It does goes in stratified mode. I can also see that it goes into desulfuration on the highway - which it wouldn't do if all stars are not aligned. :) I still have negative long fuel trims (especially at idle) which I am trying to figure out why (I am thinking temperature sensors, PCV, Vanos). Fuel pressure (high side) still drops when stoping the engine - but I was told I got it wrong, and this is normal for this engine... And I have an error on the water pump (miscommunication or something like that). You cannot get bored with this car :D

[@MartiansChronicle]

@CosminRotaru Good to hear the misfires have gone. Do you have 0 misfires or do you still get the occasional one? You might be interested in this (from Bimmerprofs): 1. "Remark: In my blog, I have previously mentioned my observations that MSD80/81 (BMW E series) stops updating the individual adaptations of the injectors in idle/Stratified charge if the AC is turned off. I have no information regarding problems/switching off regarding other adaptations (but there is a significant possibility that previously mentioned injector adaptations are not the only ones that are turned off)." 2. "Note: keep the AC always on! Only/if AC is on DME can determine the engine’s mechanical load (alternator and AC pump). Only if AC is on, DME upgrade injectors adaptations in idle/Stratified charge." I don't know if you have INPA but if you go to the above site, you provide the required data from INPA, and these guys will analyse your engine. Nobody knows these engines better than them. It's better you spend 50 Euros on analysis than change parts. :)

[@CosminRotaru]

@@MartiansChronicle i still get some occasional misfires . The AC-on suggestion i did not know (although i spent a lot of time on bimmerprofs. That is crazy! I shall try it 😁 Thank you!

[@paulmacheso9953]

@@CosminRotaru you get misfires after changing all 4 injectors ?

[@CosminRotaru]

@@paulmacheso9953 not a misfire error code, but if i look at live that i can see some every once in a while, at start basically. I'm not worrying about those.

[@christiantuch6283]

Hi, super interesting video. i may be facing the same issues on the 2 liter version of the N43 engine but im relatively new to doing stuff on cars myself. Thats why im wondering what app you are using in the end of your video to read all the parameters ?

[@CosminRotaru]

Hi! That one is Car Scanner Pro

[@seabhreach]

You can read all them with ISTA also

[@Telstar_1]

Just a clarification please. You found injectors in cylinders 1 & 3 were leaking, but you seemed to replace and code new injectors at cylinders 1 & 4?

[@CosminRotaru]

Hi! Yes. The test only shows if injectors are leaking. Also the fuel pressure during cranking might not be as high as the pressure provided by the hpfp when the engine is actually running. So s slight leak in this test might be worse when the engine is actually running. Besides leaking an injection might be broken in other ways. It might be clogged or with a bad spraying pattern. So after changing only those two injectors i still had misfires. But i think i have explained this in the video. With the misfires and the fact that the injectors were old anyway (before index 11) I have decided to change them all. My conclusion is that, with these engines, at some point you will have to update to index 11 injectors.

[@CosminRotaru]

Or maybe i did not understood the question. I have changed ALL injector but did not show the whole process.

[@Laxxii]

Bună ziua! Im from Germany and have a Romanian girlfriend! Just saw your video and I have miss fires in zyl. 4. In a few days, new spark plugs and coils come and I’ll install them and hopefully they help. But I suspect my injectors gone bad! Probably have to replace them too so my Question is, when I start the car, it idles over 1k but after 5 seconds or so it’s starts to lower to 400 and it shakes quite a lot as the engine wants to die. Check engine is flashing then. Once my motor is warmed up only a little, it starts normal again no engine light. Do you think it’s the injector or maybe even Vanos magnet valves? Mulțumesc Marlon

[@CosminRotaru]

Frohes Neues Jahr! Is it the same N47 engine? Not all bmw engines have crappy injectors 🙂. On first start the engine will run very rich by design. Over the next seconds it will adjust for regular mixture and revs will drop to about 750rpm. As the engine is still cold, and especially the oxygen sensor, it will not run in closed loop yet (the oxygen sensor is not used to adjust the fuel mixture). ECU will used some predefined (map) settings. It looks like in your case those predefined values are far from what is going on in the engine. Then you say that once the engine warms up a bit it runs ok. I assume the oxygen sensor is warmed and the engine runs in closed loop and is able to adjust the fuel properly. Do you have access to some diagnostics equipment? I would look at the fuel trims to see if it adds or if it subtracts fuel. And read the errors, off course.

[@Laxxii]

@ it’s the Same N43 Engine as in your Video yes! I’m in the process of Downloading inpa as I don’t have proper diagnostics atm. I’ll commend here again, once I’ve switched coils and spark plugs. Thank you very much

[@CosminRotaru]

@@Laxxiilately i start with bimmerlink and Car Scanner on my phone. Most of the time they do the job . Just make sure you use one of the tested/approved obd interfaces for bimmerlink.

[@ngwoodworking7691]

Hello, could rings be compresed with hose clamps? Thanks..

[@CosminRotaru]

That seems a bit excessive... I've seen people using pen caps. And there's a special tool set from bmw...

[@ngwoodworking7691]

@@CosminRotaru Okay thanks would use pen caps.

[@NotMoby24]

Hello, Thanks for great video! What do you think about the symptoms on my N43 engine: - Car is shacking at cold start (ambiant temperature in my garage is 15C so quite not cold) - Motor goes up to 1100tr/min for a few seconds then drop to 680tr/min or so - Shacking diminishes when driving then goes stronger at idle (red lights) - Same shacking on P R an D. Seems sometimes a little worse on R. - After shifting to D, when releasing the brake, at cold start, car almost "jumps" instead of being smoothly mooving forward - When car is warm, car seems way more stable - Occasionnal rough start when warm Did you have something like this?

[@CosminRotaru]

Hi! Idle control, especially is quite tricky. Everything has to work perfectly for good idle. Do you have access to a diagnostic tool?

[@NotMoby24]

@@CosminRotaru yes, I had serious misfire on cylinder 3 and 4. These misfires disappeared for a few weeks after new coils then came back rapidly

[@CosminRotaru]

Maybe you got the misfires just because the coils - but you might need to change the spark plugs as well as they might be dirty from all the misfires. Hopefully it is not the injectors - common issue on these engines. If you know they haven't been change ever, you should probably change them. They had 11 iterations (updates) on these injectors. The last one ("index 11") are from 2014 i think.

[@246alfa]

Place the injectors on the stand and everything will become clear in a minute. Check 120-200 Bar.

[@rafaelsouzapedrosa]

do i need to code the injectors after i clean them ? if i disconnect the battery before i clean it ?

[@CosminRotaru]

The numbers on the injectors represent measured flow that the ecu needs to adjust fuel. You do not need to re-code as long as you put them back in the same place.

[@246alfa]

@@CosminRotaru These are two correction factors that have already escaped.

[@zdravkobelinski4627]

one original injector index 11 is 450£ 🙈 i have bmw with 320i same engine and already has issues on 56k miles 😢

[@werdnaf]

Same, I have one replaced yesterday for 585£ (price of part same day) in Hungary. Mine has 140k miles so all should be replaced very soon. T_T Info from my mechanic: prices skyrocketed since COVID, and a really good quality aftermarket (Bosch/VDO) part is expected to arrive within half a year for a much better price. I'm trying to get my car working until then.

[@EMSGARAGEE61]

Good Job🎉😊

[@CosminRotaru]

Thank you! 🙂

[@246alfa]

There are many other problems with these injectors even when they are sealed. Sometimes there is a torch, but they meet with weak piezo elements, they transmit 30-50%. Revisions can be placed in the same row, different ones.

[@246alfa]

I just can't understand. At my stand, it costs 7-8 US dollars to make such an injector. The test lasts 5 minutes. Click on the nickname, there is a video there. I made them on old stands.

[@CosminRotaru]

To make them? What do you mean? Maybe to test? There are not many places with test/clean equipment for high pressure injectors. I asked in my area they only do diesel or regular injectors.

[@246alfa]

@@CosminRotaru Sometimes it works out. But to do this you need to understand what you are doing. I cracked their code three years ago. I had an idea to code them. But then I thought about it and there was simply no one to talk to, so I closed this issue. If you wish, I will show a lot of videos via Viber or Telegram. And I’m the first in the world in electromagnetic fields)))), seriously. I work with hundreds of services across the country, but we don’t publish our work.

[@246alfa]

@@CosminRotaru Sometimes it works out. But to do this you need to understand what you are doing. I cracked their code three years ago. I had an idea to code them. But then I thought about it and there was simply no one to talk to, so I closed this issue. If you wish, I will show a lot of videos via Viber or Telegram. And I’m the first in the world in electromagnetic fields)))), seriously. I work with hundreds of services across the country, but we don’t publish our work.

[@246alfa]

@@CosminRotaru Sometimes it works out. But to do this you need to understand what you are doing. I cracked their code three years ago. I had an idea to code them. But then I thought about it and there was simply no one to talk to, so I closed this issue. If you wish, I will show a lot of videos via Viber or Telegram. And I’m the first in the world in electromagnetic fields)))), seriously. I work with hundreds of services across the country, but we don’t publish o

[@246alfa]

@@CosminRotaru Click on the nickname, there are old videos on inspections