The Infamous Cylinder 6 Misfire is GONE! | BMW E90 N54 DIY
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- เผยแพร่เมื่อ 20 ก.ย. 2019
- In this video I show you how I fixed my cylinder 6 misfire that I've been tackling for some time now.
I'm working on my 2008 BMW E90 335i with the N54 engine.
If you search up high RPM cylinder 6 misfire for this car you see a ton of threads discussing this issue. It appears to impact a number of cars, on the manual cars the dual mass flywheel can be the culprit as it creates noise that the knock sensors pickup.
In my case it was the injector's ability to seal. I think cylinder 6 goes first due to the excess heat it experiences and the fact that it is the last injector on the rail.
The method I show here could actually help some of you guys that have improperly installed your injectors in the past and have an injector bore that has ovalized or blown out.
If you want to purchase the decoupling element and Teflon seal you can get them here (affiliate):
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and
bit.ly/2kur0fs
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Glad it’s fixed. These small issues can drive you crazy trying to diagnose.
I've got an N52 (2006 325xi) with 155k mi., but seeing this video motivated me to spend the "enormous" sum of $50 to replace the fuel injector o-rings and clips. That may be the best $50 I've ever spent on this car. The car's response time to acceleration improved noticeably. The o-rings were originals, so they had shrunk and become a bit rigid with 15 years' exposure to temperature changes. Thanks for the video!
You're welcomed. I am glad it helped. This is why we make these vids.
First of all I want you to thank u for this video. I wanted to give up on the n54 for cost thats involved to maintain it. I stay in South Africa and here everything is expensive. This was a very bad year with repairs, radiator, AUTONATOR, starter ,water, turbos, valve cover and it started with the misfires. I manage to get hold of second hand injectors for new index 12 was just to expensive for me, about $2000 . This is about R45 000 in my currency which is a lot of money for index 12 injectors. After watching your video, I went to feel on my injectors and 3 of them ware not sealed properly and felt loose while even though it was tighten properly. I took out those 3, use the Teflon seal tape , and they seated tight. Start the car and took it for a drive. I felt so relieved....my power was back, thanks to your video
Dang best BMW DIY channel on TH-cam. Just bought my first X3 and able to prep for anything that goes my way and be able to fix myself.
I'm at the point of just sending my entire car to you to get it up to par. Great DIY!! Keep them coming.
Funny, because a lot of folks have done that and got their cars totally sorted without spending 15K due to all the maintenance issues that were unknown.
@@bmwchannel7209where can I do it 😂
Omg the tolerances are so tight, even the smallest out of spec sets off misfire. Good job!
Don’t have this issue but I’m glad you uploaded this fix incase I run into similar misfires in the future. Thanks 🙏🏻
Yooo been watching your videos for years bro I even saw this video last year and who wud’ve known that I had a misfire on cylinder 5 for 3weeks and decided to try this finally & BOOM 💥 no mo misfire… great work big dawg
I've done that exact fix and it worked for a little bit. I had new injectors on order so had nothing to lose.
Interesting diagnosis. High temperature Teflon tape is a valuable hint.
Never would have thought of that... great video.
Currently chasing a misfire. I’m new to the new N54 scene. I’m going to try this! Thanks for the great video!
I never would've thought to do that, great tip! Maybe that's my issue as well. My misfire is super random and never does it when I'm logging so I'm not sure which one but I'll get that sucka eventually lol
Interesting vid, I don't have a E90 (E39 owner here), but I am (hopefully was, just replaced my plugs after replacing coils) having misfires "during start" with Cyl. 3 & 5. But I digress, never messed with the injectors, pretty cool to see these types of repair/fix actions among owner's of said vehicles.
Tank you very much for sharing your knowledge Sr I appreciate hope everything goes smoothly in your life,chears from Quetzaltenango.
Good informative video as always.
I’m definitely gonna try this thank you I pray this works I am having the same issue
Thank you so much for releasing this video, my misfire is now gone lol, I've been chasing my misfire since forever til I watch your video
as usual great vid ,just got the dreaded 29d2 missfire on cyl 6 ,FML
What was your issues
just had a blow out of the coupling element on 24psi with my single turbo. luckily I have tons pf spares lol. went ahead and teflon taped it too on cylinder 6 and all is well again :)
@Vehicular DIY Thanks for this video dude, just subscribed! I have a 29D2 (Combustion misfire) and 29D9 (Misfire at low tank level) yesterday and the coil packs/spark plugs look fine. Gonna have to try this out 👍
How was it after you fixed it?
@@Lu-e Wow, respect for checking in dude.
So after taking it to the garage (as I didn't have the tools or experience to check it myself) the mechanic said the engine was was overheating causing the misfire in cylinder 6. He changed the rocker cover and 2x spark plugs. It's been almost a month and drives perfectly again! Hope all is well bro!
@@Kellloggz you mean he replaced the valve cover?
@@ItSpooling_yh same thing rocker cover - valve cover
Wow a Pick Trick ! Never saw that ! And the Pen top trick is out there !!! Excellent and Pulls like a Banshee !!! You make me want an 335 I NOW !!! Not sure have to check what tech you are using for tuning ? Please put in description Thanks
Great job 👍
Awesome man your the best!
Way to go. Thank you.
Nissan RB engine has same issue with boost fed versions. They solve it with change to better flow intake so there's even flow of air and fuel to all cylinders
You are the man!
Brilliant thank you 😂😂😂👍👍👍 I going to fix mine too ...
Worked for me, mine was missing the decoupler. I’ve had it 5 years and never knew it was missing it
very help full Thanks
Excellente! 👍🏻
Where did you buy the seal and decoupler ring? On my e90 316i, I don't have those decoupler rings and I think they never changed the Teflon rings either.. Do you also have part nr?
Thanks man
You are a GODSEND and have helped me with my n54 tremendously, so THANK YOU! I've replaced the seal, decoupler & spark plugs but still experiencing cyl 6 misfire. Any recommendations on next steps in diagnosing the issue?
If you did all that and still getting misfire on the same cylinder, that is a sign that the injector is needs replacement. Even if it is a series 12 injector. If it is not a series 12 injector, then that would be your issue right there.
Great angles, solid video! Had fun watching. I have a misfire code on cylinder 4, stock injectors. Thinking of changing 456 cylinder with index 12s. Thoughts?
Change all 6 you cannot mix Mach injectors
THE SPEEDO MOVES QUICK
Ur great man !
Wich code did it trowe in this case cause ive got on cly 6 and 4 some injectors without any index number :/ the rest are index 12 and now it throwes 29E1 fuel mix control 2 and sometimes 2E35 fuel injector clyinder 6 activation . U think its the mosfet or because of the other two old injectors it worked god for about 10000 km
Maybe this is the reason for the ghost fails in cilinder 5 that a lot people have
Hi, so I changed my injectors to index 12 and still have a slight misfire on my cold starts, and I’m fbo MHD stage 2 but when I go stage 2+ the car has blown out my cylinder 5 injector twice already, when I take it out it does have some damage on the side of the injector from hitting inside I guess and it’s black from the top because of the burnt fuel is my guess and it also breaks the bracket along with it, could this be a ovaled out bore and I need a new head?
Oh no magical theories
You may just fixed my car with this video, one question though. You don't put the teflon tape on the seal at the tip? Just the decoupler and bottom of the injector?
What was the original code number? What did the misfire code say (other than misfire)? I have code 2e35, cylinder 6 input signal.
hey man I just bought a E90 335 with a bit of high mileage, I found a few issues with the car, and I wish to dig a bit deeper. Please recommend a good OBD diagnostic tool, and a good place to purchase E90 parts for reasonable price! Thank you! Dean
Nice
2010 335Xi Sedan 4th cylinder misfire, N54, having the dealership check it out since I’m already going in for a new battery and I have a service coupon 😅
For people stills searching this. They also have a kit to get these oring compressed on your injector
All we need a diy for now is custom headlights
I have some UHP LED rings to install in mine but I'm dreading opening them up.
By "Misfire" do you mean actual DTC error entries or only high corrections on these cylinders?
Do you use regular plumbing teflon tape? Cant seem to find high temp teflon tape?
I am getting same misfire at 6200 my car is heavily mod turbos coils pumps u name it. at 6200 I get a misfire try everything n don’t change, is good at 1 n 2 gear soooo they told me dmf just want this to go away. tuner will be by passing misfire codes but great video
should you use some silicone grease on the o ring?
Hi mate I have leaky injector on the tip any idea what to do with it ?
hi bro I have same pro before misfire no.6
after so many things I done finally fix pro
high pressure fuel pump and low pressure fuel pump and with other side filter tank I change now car work like new
What do you mean other side filter?
Yo i got a 328i convertible 2011 i just got code misfire for cylinder 1-4-5-6. I change the spark plug like 1 year ago didn’t change the coil pack so now should i change spark plug and coil pack on all of them?
My 2011 x5 just got walnut blasted at bmw. A week later misfires on 5 and 6. Removed coil boots and both wet.. Any imput??
Pumping out the content man. Congratulations on the fix! Hows the intercooler holding up with the new turbos? I'm contemplating 50/50 water meth injection myself to keep iats down.
Thanks! Surprisingly that intercooler does alright. I think it's holding up okay given the IATs are lower in the new turbos. I'll probably upgrade soon and do some back to back comparisons.
Nice! Yeah I figured those turbos being more efficient would have lower iats. Alot of people go overboard with a massive intercooler with stock frame turbos.
Wagner type Intercooler or....
I need help. I took out my fuel injectors to get them serviced and I just put them back in and now it won’t start. What could it be?!
Is Teflon tape safe for in engine will it fall off when you pull it out
Can you provide the part number(s) for the coupler and seal in the clear bag, or where you got it , thanks. Also how is the new HPFP from spoolstreet doing since you installed and if you had to do additional coding for it ????
I put that info in the description. The new HPFP overdrive is holding up well. I did have to get a custom tune to accommodate for it.
This videos is just for seals replacement but will not fix the misfire if the injector is leaking fuel into the cylinder, most of those injectors has that issue, so replace it is not a bad idea as well.
I just want to say thank you first of all. You have helped me troubleshoot my brother's 135i N54 engine rough idle and stumbling. I swapped out both O2 primary sensors, fuel injectors with index 12 injectors, replaced spark plugs and coils on my brother's vehicle.But right now the issue is we plugged the bank 1 O2 sensor and the car idles fine and no check engine light comes on after I cleared the errors with INPA. Currently I am at a loss where to go from here. Do I replace the O2 sensor again or reset adaptations? By the way I did the reset and still see the readings on the O2 sensor go all over the place then after a minute or so it operates normally and the car idles just fine. Again I have it unplugged and the car runs fine but not perfect. It has a slight roughness to it but only in low idle. Ahh I feel dumb because I am so close to fixing this!!
So you're still encountering a rough idle at this point?
@@VehicularDIY No its smooth out like its supposed to but with bank 1 O2 sensor unplugged which i think is hilarious. The car ran all day yesterday like butter without that sensor plugged in. I was told by another mechanic that we may have fouled up our new O2 sensors during our replacement parts efforts since we ran with the new O2 sensors prior to swapping out the old injectors which we know they were leaking. All of the plugs smelled like raw gas. We will give it another try after pulling the sensors and cleaning them out. Ah gotta love troubleshooting! Thanks for taking the time to reply.
Do t you have to code the injectors I saw !! Or you don't have to code if you installed the same injector back in ?
It took my e90 335i and drove the hell out of it for an hour. No more ticking sound during cold starts, no more random hesitation (misfire?), seem to be faster too.
Noice, did u put the seals on or did you buy the ecs kit that comes with seals installed when you got your index 12s?
injectors come with new seals
Yeah my injectors came with new seals and a cap to compress them originally but I did buy new decouplers back then.
Is it better to do this or swap injectors first?
Do you have catless down pipes and rear cats?
I have a misfire on cylinder 2 and changed the spark plugs and coil packs all 6 but still have a misfire on cylinder 2 . Is it okay to change just ONE injector ? Instead of spending so much on all 6 I currently have all index 12 injectors. I’m guessing cylinder 2 injector is worn??
only changing one may not last long... change at least all 3 of the same bank... to index11 if N53 and index12 for N54. Changed my 3 bank ones with used index11.have done 12000 miles... all good
I keep getting a misfire on cylender 5. I changed the coil and did all 6 plugs. My question is if I have a bad index 12 injector and replace it with a new index 12. Do I have to re-code that specific injector??
yes
Had any more issues with cylinder 6?
I took my sons 07 335i to the dealer with hard start issues. If the car is not driven for a few days is is very hesitant to start. Lots of chugging and sputtering. The dealer thinks it may be an injector leaking back. They didn’t say which injector it was but I assume it was 5 or 6.
Would this fix work for me?
I believe the car has index 10 injectors. I’ll have to double check.
The motor has been smoke tested and the vanos solenoids cleaned. New o2 sensors as well.
That is what mine was doing until I replaced #3 which was misfiring and leaking onto the plug. I let it sit overnight then pulled all the plugs. #3 plug was only one wet with gas smell.
Gonna have to give this a go. Just got the cylinder 6 misfire yesterday. Mine is only doing it at highway speeds in 5-6 gear. The car stutters if I give it more than half throttle then if I keep at it it throws the misfire code.
Also kinda off topic if I drive up to operating temps and then park at the grocery store for around 20-30 min and then I’m driving out the parking lot but have to make the occasional stop for pedestrians it starts smoking like crazy. What could this be?
did you figure it out?? i have exact same problem😬 𝗶 want to know if it’s injectors before 𝗶 replace them. lmk pls😅
@@saintily I checked cylinder 6 and the coupler was broken and the gasket was completely gone. Replaced both parts and did the Teflon tape and good as new. Felt way stronger too. You can tell if it’s just a gasket failure if there is soot buildup. I could see it before even removing the injector. Good luck
@@saintily if your not on index 12 you might as well upgrade them all. Gonna cost a pretty penny tho lol.
my decouple literally fell off when i put it in just thought it would be fine anyway
Seriously Teflon tape. That will work and last?
I have 2 mis. I can’t get rid of. Doing leak down test I’m hoping it’s the bore as I’m out of options. Good and bad if bore but at least I know there’s a fix.
Do you not have to code the new injector?
🙏
Any local place in Houston that sells this seal ?
Best
Apparently a new injector recall coming out for 2007 to 12/2008 335s
Sucks cus I have an 06 November build
1) BATTERY SHOULD be DISCONNECTED When Working on Cylinder 6 Injector MISFIRE. De-Couplers, SEAL wear out. Cylinder Head may need 2B replaced.(teflon tape).
2) Removing the COILs...
Advice needed my 07 335i when under load would throw the check engine light and drop a cylinder on cylinder 6 causing it to run on 5cylinders until i turn the car off.. over the weekend ive replaced the plugs and put a brand new coil on 6th but am still getting the same issues do you think this would work for me? Cheers
any updates? im currently going through the same issues where it misfired until i shut it off and restarted. just replaced the coil pack as well
I just done the same thing with you, but cyl6 still missing fire lol, the plug and coil are good. Do you have any recommendations? Thank you very much!
You figure it out?
Did you fix it?????
If it has soot all over the injector is it a 100% the head is fucked I made the mistake of installing the bracket backward I towed car home after fuel line broke in half replaced injector with seal made sure I put bracket on correctly and it sealed for 2 weeks then randomly one day blew again out a new seal with Teflon tape and now I’m praying...
I have a question. Just changed a cracked fuel line and now I’m having a misfire no matter the rpm. Plugs, coils and injectors are brand new...
run codes then start diagnosing
I changed spark plug and ignition cpil for cylinder 6 still getting the same trouble code 🙃
Same... Any luck? I'm about to do this or get another injector
@@mitchellh4028 I just got the injector havent changed it no time however I might tomorrow , could also be an issue with a ignition or soark plug in another cylinder specifically #5 that makes 6 trip. Keep that in mind switch em around
@@mitchellh4028 I changed it and it seemed to fix it stopped chasing. However after a day I sti have the misfire however she runs fine.
Wouldn't a leak-down test or compression test show a possible injector blow-by?
That's a good question, not quite sure but would be worth looking into.
Hello i have misfires in afew cyls at high rpl done plugs n new coils but my spark plugs (not all) have oil on the end do you think the inner rocker cover is worn.. how else could the oil be on my plugs.. thanks ?
If the seals on the valve cover around the spark plugs are bad then oil could get into where the spark plugs go.
the spray pattern of your injectors gone wrong... clean to see if oil disappears or just replace injector
I had index 12 installed and still misfiring on 6 now I'm told it's a bent valve from BMW dealer mechanic. does that even happen. now says has to do valve.09 535 I stock
Assuming you did spark plugs, ing coil, and injector, check the compression . Also, you could have just checked compression at first. The Mosfet in the ECU could be bad as well
@@luyanoHThankuou for replying . did plugs coils mechanic at bmw dealership said compression on 6 was low after changing injectors. he did say he unhooked computer. is there a code that would say this for ECU mosfet?
@@westcoastnaturalwolverine4068 You can check the mosfets with a multimeter, this channel has a video on it. I am not sure about the ECU giving more codes other than misfire. Now, since compression is low, there is only a few places it could be leaking from: *The injector itself of around it (injector seal, etc) where it goes into the head. *Thru the Spark plug ( most likely not since they have been replaced ). * A bad piston or around it ( DONT WORRY most likely not :) ). * And, of course, a valve that isn't sealing right ( in this case bended according to the mechanic ).
I would try asking the mechanic if instead of a bended valve, it could be carbon build up around the valve, causing it not to properly seal with the head.
Is it the same to the N55 engine? only cyl 6 above 6k. very consistent. Scratching my head. 6MT M2
Also wondering. I got this issue when I send it from gear 2 to 6 or so. Let me know if you find out something
Plumber Secret ! LOL
This is exactly what happened on my n54. It was so bad the length of the shaft was black. Cleaned up, replaced decoupler and installed seal, cleaned up the injector receptacle hole and car is buttery smooth now. 👌
Here's my video verifying this video. th-cam.com/video/0w3HS1zhueQ/w-d-xo.html
Hey man any update? What did you use to clean your hole lol
@@amirholmes-qi4fd vacuum the hole. Avoid spraying anything into the piston chamber if you don't want a no good very bad day.
How many thousands of injectors have been replaced for just bad seals?🤷🏻♂️🤷🏻♂️🤷🏻♂️
if you have Index 7 or even 8, you need to upgrade to 12...period.
If the works corect, you dont have to replace, i have index 11 and they works great
@@hiflor1275 had index 11 on my last 335i and my current 335is also has index 11. Never had any injector issues as well. knocking on wood lol.
@@chef423 my car has mixed 4's and 9's
Thank you based god 🙏
How is the ebay intercooler holding up with that amount of power?
So far okay, I'll probably be upgrading soon and will compare back to back.
is it enough for fbo?
Use a new seal I had this was going to tell you but I forgot to lol or coupling
what kind of bumper lip is that? looks hawt
It's called an AK style carbon fiber lip.
Before engine and after engine power/smoothness etc would have been good.
ive changed coils and plugs constantly on this model ..... typically 1 2 4 and 6 coils (never 5 or 3).. but it keeps coming back after less than 50miles post fix ............. why? why? why? ......... latest error is showing rich mix ... im stumped ..... my mechanic has no clue... does anyone know of a good mechanic in the plumstead area in london??
injectors
Yes, injectors. I am in London. have all the professional tools. if you need help, you can find me on gumtree in motor services for "bmw rough idle solutions"
have you solved the problem?
It stands the Teflon tape at heat ?
Yeah it's not in the combustion chamber so it can handle the head from the head.
Pls do a video on main dme relay switch location (mfg part 61366915327) on 335I 2008 (sky blue color). No accurate info exists. Great videos, thx a lot you've helped mea great deal.
I’m having cylinder 6 misfire 292D and 2C7C everytime I go wot around 5500+ rpm any idea ? Thanks
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