I had the same issue with a N42 engine. One sign is gasoline smell from the exhaust or when you take the oil cap off and the bad odor is a dead giveaway. Other issue is also timing of the engine goes out randomly even with new vanos unites and chain installed. Another thing is if the engine runs poor but starts running way better when disconnecting the MAF sensor(+multiplied fault codes from the EMU). Combine that with bad gasoline smell from earlier that is a give way you need new injectors. Or the old ones at least need to be tested. If the vehicle is approaching 250-300k miles it should be something to pay attention do. Sharing here a personal experience :) Hope it helps others. Very good video btw.

Thank you so much. My C4 Corvette had many of the symptoms you explained and in all the videos I watched only yours really showed me what a bad injector sounded like. I had slightly rough idle, harder cold start, whitish smoke on start ups. Sounded like gravel in a tin can. So today I will pull the fuel rail, clean and rebuild each injector. Cheers

Great video mate!!! You have given me so much peace of mind knowing that my symptoms are specific to injectors... thank you for showing examples and even going more in detail about the importance of this repair. Subbed!

Ignition misfires almost always manifest themselves at higher engine loads rather than at idle Fuel Injectors manifest their issues at idle and light load rather than WOT as they go to open loop and rich.

This was very in detail - and very helpful. Thank you!

Wow, one of the most helpful videos I have ever watched, thank you, I got all those symptoms lol

Out of all the videos I’ve scoured through you have given the best advice and I appreciate it. My n54 blew up 12hours after I purchased it. My friend did a pull and I suggested he didn’t. He weighs 300lbs too. So on my way home it blew up rather violently and seized the engine. I was just in a trip home that night from the dealer had to take my dad home and stay the night there as it was late and it’s a 50+mile drive to my place. I had to take my friend gas can he left over at my parents place when he was helping me move. Now me and him have owned rx8s and he has corvettes so he was a lil enticed to drive the car my 2011 335is and I even suggested he shouldn’t do a pull but he did 4-5 he at loaded pulls with our heavy weight int he car. Now I’ve driven my r3 rx8 with him having 200+hp and that was actually sluggish as ever. But my dad did pint out before I began my voyage home that the car sounded off with a noise and he may have heard a leaking injector he didn’t tell me about the noise until after the motor seized on my way home so the spirited drive was already over and car was fine half way home until it happened so randomly

Best video i ever watch about N54 injector(s) sir

Hello, I have the 335i 2009 convertible, the angel eye shakes and turns off, can you tell me if i need to change it or what I should do? thanks.

Big help man. That's exactly what my BMW bz4 is doing. Thank you

Great video. Thanks for sharing!

Thanks for your symptoms. My car does need new injectors! 👌great video.

nice video 🔥🔥

I was on cruise control going about 80 and then I got a ticking sound but it only starts happening when I hit about 45 mph anyone know what the problem could be

Loved the video !

Hey.. e92 coupe issues. I’ve had rough idle for a while esp after a long drive then restart.. but today, it dies while reversing into drive. And yellow EML came on.. thoughts? 👍🏻

Excellent video! Thank you!

Mine has rough idling at cold starts and car is stuttering ONLY on the highway near the 3-6k RPM band. If I do a quick agressive launch while doing some city driving the car just goes like it’s supposed to. I also do have bad spark plugs though

I had a high idle and white smoke right before one injector failed on my N20-528i.

Thank you for very informative problem of the misfires caused by fuel injectors

I’m currently have my 08 335i at my mechanic for comparison bc of this injector im starting to think its injector 4 bc it’s doing the same thing when it’s cold

Would bad or failing injectors cause car to stall at stop light

Very helpful video. Thanks! If you have stock exhaust, and if the exhaust smell very strong, did you find that to be a potential sign of failing injector as well?

Hey, I’ve been getting random/multiple misfires pretty much in all my cylinders & terrible gas mileage so gradually I was leaning towards my injectors but when I accelerate hard (only when accelerating hard) when driving the engine seems to lose power & heavy white smoke comes out. Could it possibly be a blown head gasket instead or injectors ?

Who else liked when their car made those pops at cold start and sounded like it was cammed when you had bad fuel injectors? lol

Greeeeaaaaat video!!!

New to the community and the BMW community as well. I have a 08 E90, Just bought it last week down in Key West (Navy Stationed), came with 77k miles and it seems like it has some problems. I have a rough cold start/idle/check engine issue it seems like every monring. The car before I bought it wasn't ran for two months so I could say it's just knocking the rust off but I don't think so at this point. Just had the oil changed yesterday and it still had the rough start, but I'm driving half way to the shop and it gets itself together and the lights go off and it's normal, I had them run the codes and it said injectors and misfires on like 3 cylinders. It seems that it needs to heat up before it runs normal. I ordered spark plugs and coils and I plan to do some TECHRON today to give it some love. Any help would be appreciated before I drop bags of money into a car I just bought, literally on the 4th of October. Just looking for someone to point me in the right direction on ways to approach. Thanks! -Dominic

Thank you buddy!

I have every sign lol I think it's time to change my injectors. Great video

Do you know if injectors will cause afr reading to fluctuate for 1 of the banks? I got all new o2s (front n back), reset adaptation, but still getting bank 2 lambda after cat code....

Great job

Very informative video bro. Thanks a lot. Getting crazy here with my Z4 35i e89 N54. I have misfire in cylinder 2-4-6. I don't do works by myself so car is at garage now. Last year I had injector n2 failing... Now this.... And my mileage is below 35k in all.... 😭

Hey hopefully you can see this, have been getting a rough idle and cylinder 3 misfire (29CF), off a cold start rpms flutter around 700-900 rpm, then shakes as it settles down to 600rpm, changed plugs and coils and had an oil change, ran fine for a couple days then rough/shaky idle again as well as threw that same misfire on cylinder 3, checked the new plugs and found more than one covered in fuel, i found it odd that i was only it getting cylinder 3 misfire but more than one plug was covered in fuel so i think it’s leaking from injector #3 into the other plug housings, like your video said checked oil fill cap and smelt gas as well, from everything i’m thinking the injectors, but i don’t have the facilities to remove them and try different combinations to test, just looking for some confirmation/input as i don’t want to go ahead with pricy injectors and them not solve my problem. Thanks

Nice video i'm having same symptoms car starts harder and have misfire no code thou, more on cylinder 3 and I can hear extra loud tick and I have noticed white smoke in morning but goes away, also feels sluggish.

Hi, I've got a problem with my E90 and I'm wondering what it could be. The symptoms started a couple of weeks ago with, for example, if I shifted from 2nd gear to 3rd gear and stepped on the gas, it started to chop. Kept it like that for a couple of weeks and now it's pretty bad, if I do a cold start the whole car moves, shakes sideways. One day there was no power in it at all. The fault code reader shows misfire on the 6 cylinder, a guy at a workshop put in a used ignition coil and then it got a little better but not great, but have bought 6 new spark plugs, 6 new ignition coils to see if there might be something there, otherwise so maybe it's the fuel injector?

Thanks bro 👌💪💪

hey so quick question uhm I have super thick white smoke coming from exhaust and some super light/faint smoke coming from hood do you think it could be the head gasket or fuel injectors or maybe something more?

Can Bad Injectors make the small fuel rails on top vibrate more than the others ?

Is it possible to live monitor all/individual cylinder misfires w/ProTool or mhd or any other software?

Thank's!

Would green diesel suddenly block the fuel filter? Because as I was trying to jump start the car, the fumes suddenly stopped coming from the exhaust. It's as if something suddenly blocked?😭

on a cold start my n55 will jump from 500rpm to 1000 a couple times then die. once i takeoff and start driving it’s normal, is this a sign of bad injectors?

Yea i got brand new coils and spark plug but my damn exhaust is loud asf and im under boot like hell

Who does wal but blasting in trying to get it done to my 335i? Pls comment if you know any locations

When I started my car and start driving for good 20 mins, and then shut it off for two hours while I was at the store, and then I started the car again. I got stuck in traffic was sitting at full stop idling for about 5 mins and then a lot smoke was coming out from my exhaust for good few mins then it went away. Is that a sign of bad injectors? I know it can't be my turbos. Thanks.

Hi! I am glad I found your videos. I have a problem with my n54 e93 which I can t solve. Maybe you can help me please. I blew the engine a few weeks ago from missfires. I rebuild it, put everything new (pistons, bearings, rods etc.) Now I have good compression, no oil leaks. I changed the sparks and coils. Injectors are index 12 and no one looks like is leaking. The sparks looks clean. My problem is that the car is still missfire and I get no codes. I took the car to dyno to read some logs and when the moment the car missfire the first 3 injectors run too rich. But in other logs it looks like the next 3 injectors run too rich. I have not clue what to do. Maybe an o2 sensor? Or map? The missfire appear only when I have 100% acceleration and it drives strange at constant speed. It looks like it is shaking.

I had a misfire changed all coils and plugs and now it’s still doing it but giving random misfire codes and smells like gas and white smoke coming from under rear of car I hope it’s just injectors

What about if when you step on the car a little bit smoke comes out the exhaust and a really bad smell

I have that same car and always thought is a 328i

Got SES for P302-P303 and P0175 Installed new spark plugs SES still present Receiving new coils today and will install them this Saturday 9/12 along with inspecting the new spark plugs after sitting overnight to see if there are any fuel on injector 2 and 3. If so it’s injector 2 and 3

I thought white smoke means coolant burning. Should it be black carbon smoke?

I have a full straight pipe n54 catless dps and all , at random my car will smoke like crazy , I replaced a upstream o2 sensor and that fixed some of my issues but still a good amount of smoke with a fuel smell , any takes on what this could be ?

Do i need to change all of them? Can i just change the bad ones?

Had a code saying one of my injectors was bad I replaced it without coding them but when I took out my old one there was oil on the tip ? Would that be cause my the valve cover having a crack on it ?

Is your engine more silent now at idle? Mine sounds exactly like yours on the video

Thank you my 230e Benz is having contaminated engine oil!I think it's them thank you black smoke 2

Did u buy new injectors and what kind

Hey, I recently switched out all my spark plugs and even the timing chain since my mechanic recommended it, but it still hasn’t gone away.; Could the problems still be failing injectors if the tapping increases when I accelerate or is it likely a valve lifted issue? For some reason I am also getting gas-smelling white smoke out of my exhaust too.

white smoke usally is normal for petrol cars, just a vapor, cold warm combo

With this being said I think I have bad injectors and they are pretty expensive for index 12 at the moment how long can I drive like this I think I can pay them in full up but up until a month from now

Do i need to code the new injectors?

Hey mate, I've been having problems lately as well. Recently replaced all spark plugs and coils but still having a misfire when I start up, the car seems to struggle to keep it's RPM's and I sometimes here the engine drop RPM quickly then go back to normal, is that a injector problem? Also, I can't hit the rev limiter either, if I do, it has a spat attack and comes up saying multiple misfires on cylinder 1 and cylinder 2 when I red line it to 7k.. Just wondering if U could shine some light on what it may be, if it is injectors gonna fork out the money to get index 12's 😬

I wonder how much for a replacement for 2007 525i

Hi mate. Would failing injectors also cause huge power loss?

Im not sure if its my injector that's failing or my hpfp, Im getting codes 29CD - Combustion misfires, cylinder 1, 2AAF Fuel pump, plausibility and 2E18 - Firing Cylinder 1. its on limp mode now. Can i switch the injector 1 and 2 to see if im getting cylinder 2 misfire to determine if in fact it is the injector thats the issue? and can i do that without replacing the rings and decompressor rings simply to diagnose? or can i casue damage this way? My original issue was after hard acceleration especially on the highway the car was choking / shaking. I have replaced the coils and spark plugs , which seemed to fix the issue for a month. few days ago i accelerated hard again and it went into limp mode and i am getting the codes above. Beforfe the limp mode I also got a code 29D9 Misfire at low tank fill level. prior and in addition the the codes above. Any suggestions? if it was the HPFP failing wouldnt I have issues with more than 1 cylinder?

My car is giving me back misfires, when it’s nicely warmed up after driving it for a while and when I push the gas peddle it makes popping sounds coming from the exhaust what can it be? And It’s not giving me any codes. PLEASE HELP!

BRO, i been chasing down a misfire on my n52 for a month now, its just getting worse, white smoke from the tail pipe looks like someone is blowing smoke rings, misfiring like crazy, and after i watched this, i opened my oil cap and put my sniffer down there, literally smells like a gas can, im going to change cylinder 1 injector and oil tomorrow. hopefully all is good after that. thanks :D

never mix index 11or 12s w lower index #s. 11and 12s are only able to function properly with ea other just a fyi

The way your engine blows up with a leaky injector is the worst. It can go boom and maybe enough to contain without blowing the whole car apart. But man it’s sketchy. Even I owned a rx8 it can blow a fireball the size of the Range Rover behind me. Anyways both cars feel like a fire hazard.

would another symptom be a very strong gas smell?

I think my Injectors are going bad, my car just misfired yesterday 29ce cylinder 2 and my gas tank cap was stolen 😭

What if it starts running shitty after a 30 minute drive???

How many injectors does a bmw 5 series have

excess fuel would be black smoke

Dude looks like a polished Mac de Marco

I had the same car- straight up money pit! Get rid of while its good. Even dealership don't wanna give you anything on a trade-in for this car. Good riddance...

Mac Demarco? Is that you?

Please just list the 8 then have the dialogue