BMW E46 Misfire Rough Idle Every Possibility For M54 M52tu Engines

[@hpygolkyone]

So basically there are about 50 things that can cause a misfire. Got it. I think I've found around 48 of them, so a hearty thank you for saving me the trouble of finding the last two. : /

[@gsxr2fst498]

Hahaha. That’s what I was thinking. There’s a purge solenoid that can cause the car to run rich. Go have it scanned and they will print out the issue

[@deadsinner2004]

I have a 2002 BMW e39 M54 525i M-Sport and was having ongoing problems with misfires and fuel trim issues. Every mechanic I saw said the cause was probably an air leak. Nothing definitive was coming up on the code reader. After 2 smoke tests and a compression test, these are all the parts I ended up replacing to fix it : the cylinder head (rocker) cover, all ignition coils and spark plugs, air filter, air intake boot, tube elbow, MAF sensor, DISA valve, PCV valve, idle control valve, all the oxygen sensors, fuel pump, fuel filter, fuel pressure regulator and it was still misfiring. Eventually I figured it out.... The cause of the misfiring was clogged Catalytic Converters. Now replaced and the car is running like new. Not a single 'specialist' mechanic I saw ever suggested the misfiring could have been caused by the cats. I hope this helps someone.

[@caha9583]

Did you have this problem all the time or only after about a minute after starting from cold when the engine was warming up?

[@deadsinner2004]

@@caha9583 Hi caha9583. Initially it was only when under hard acceleration, such as when I was speeding up to join a motorway. It would misfire and then go into limp mode and I would have to pull in. Over time, it got progressively worse to the point where I really thought the engine was completely cooked...I'm talking about over a period of 3 or 4 years...After removing the cats, I cut one of them open with an angle grinder. Inside was what looked like concrete - couldn't even break it up with a hammer. I do note that in this video, the last thing Nathan does say is that it could be caused by the cats. Something to keep in mind, especially if you have high mileage - mine now has 180k miles. Good luck

[@deiwer6287]

@@caha9583 mine does the same, do you discovered solution?

[@the92hoe]

@@deadsinner2004 were you also getting Catalyst System Below Threshold codes bank 1 and 2 codes? I don’t have misfires but I’m trying to get rid of these last codes I have and I’m wondering if my clogged cats are causing this. I have catalyst system below threshold codes. I think they may be the root of a few of my issues.

[@the92hoe]

I’ve also replaced just about everything you have as well.

[@JP212nyc]

My E39 520i (M54B22) has now 425 000 km and runs smoother than ever, mostly on LPG btw. One issue with these engines which is VERY often overlooked and therefore rarely mentioned: 🤓 On the M54 and M52, the hydraulic lifters OFTEN clog due to heat and cause all kinds of engine issues and fault codes, incl. misfires (!) but NONE of these codes actually mention to check the hydraulic lifters - they always "blame" another part. Hence you end up replacing alot of parts which might still be good without getting to the root cause. Try HYDRAULIC LIFTER CLEANING FLUID first, this stuff is meant to do just that, and it often really works! This is the simplest fix for your M54 and M52 engine, and you can't really hurt the engine with cleaner lifters, even if there is another fault as well. Think of it as Vitamins for your engine! And please: Try it first, comment and thank me later 😉

[@ПетрославПетров]

Do you use the lifter additive or is there a cleaner which you let run before changing oil, ty.

[@JP212nyc]

good question! it is an additive, meant to be used with fresh oil@@ПетрославПетров

[@steviepere1822]

How many times did you replaced iac valve?did it give you and problems? Just wondering what expierence you went through with that part

[@7567BotS]

I have a 2.2 E39 as well, it only has 190k km and after some maintenance in the past 6 months the car was working excellently. However, 2 days ago I started to notice a weird sound at idle and when revving it, like a metallic rub. It has also started misfiring and shaking at cold. Do you have any idea what might be the cause of this?

[@yeadaystash]

Man the way u break everything down and the pronunciation is perfect bro

[@gsxr2fst498]

So basically everything on the car causes a miss fire. Christ. Spend $1,500 and find out it needs a spark plug.

[@AusNav09]

He's talking about what can cause a misfire. To help people troubleshoot and find the issue.

[@MartinLloyd-w1u]

Always doom and gloom

[@kolbybrandt4245]

I just did that fuel injectors are 1,359$

[@Zach_Effinger]

@@kolbybrandt4245did you do it yourself ? Or pay the mechanic

[@chamberlin1]

Lol, just got done fixing lean codes and misfires on all 6 cylinders on my 2001 X5. After throwing plugs, coils and O2 sensors at it, I took it in to get smoked, and they found vacuum plug leaks and some bad hoses as well. The DISA had broken too, and was about to dump its metal axle into the intake! And to confirm your statements, it is a 158k mile M54, but it's been having intermittent CELs for at least 3 or 4 thousand miles. Clearing them got me through for a while, until the vacuum leaks got so bad that it would go out of fuel trim range in minutes.

[@NathansBMWWorkshop]

Change the ccv also

[@chamberlin1]

@@NathansBMWWorkshop Gosh for $1300 I hope our indy shop changed out the whole CCV system! I'll have to check the paperwork. I'm usually DIY but was fed up with it this time, and paid the price for it! Thanks for your channel over the years!

[@NathansBMWWorkshop]

@@chamberlin1 if they didn’t use a good brand it will fail quickly , thanks for watching

[@chamberlin1]

@@NathansBMWWorkshop Looks like $85 for the crank case vent valve... Damn well better be BMW OEM for that price! Same for the $335 DISA unit! Clear cut examples of why people need to watch this channel! I've had 27 BMWs over the years; you gotta keep the trips to the indy shops few and far between!

[@jsolo7576]

It took me two hours to change my ccv. And without removing the intake

[@bishbosh8494]

Awesome video, quick and concise yet completely and utterly informative. About to attack the vacuum leaks on mine, cheers!

[@murphnturph2664]

Excellent video. Wish more auto DIYs were like this, explaining what could cause the fault and why it happens as well. Thank you.

[@techrepairs763]

Hard to start and shaking, it was 2 bad fuel injectors for me. I’m a do it yourself guy and this about drove me nuts till I solved it. ( pull spark plug wire and see which cylinders have the problem)

[@dissolverussia4842]

I think your absolute correct. I pulled coil plug on number 2 and 5

[@EvolvedTCGLive]

Is there a way to check the injector to see if it’s bad?

[@MrBanebre]

can you explain a bit more,how you diagnosed it by taking of the coil/spark cable?

[@justinkremer7371]

Hey Nathan, I am wondering if a bad gas cap would cause low pressure and possible misfiring?. Another great video! Thanks for all of the help over the years!

[@tommaillard1415]

yes it can had that on mine creating vacuum leaks

[@YootubeUK]

Brake boosters or servos DO go bad on E46's. I've had one fail on an E46 compact. I've had both hoses deteriorated on my 328i the splits were both out of sight at the bottom. Smoke test is definitely something to consider if you think you've a misfire due to a lean situation.

[@LilHonda97]

What would cause p1343, p1351, p1345 misfire with low fuel. I replaced a couple days ago fuel injectors, sparks and coil, Brad new disavale and cleaned the ICV AND YES THAT WORK REALLY WELL... so how am I still having these codes.. BTW the car is sitting I don't drive it cus it'll stall out after being on for a bit sometimes it'll stall out after a couple seconds, remember the old disconnect the coil connector and if the engine acts up then the coil is good? Yeah I did that and I noticed cylinder 1,2 and 5 aren't working but how if those coils are good and sparks. I had them all sent out to get tested and their all working. So it's not the coils or sparks... maybe it's the coil harness connectors?

[@HopePotter-r5y]

I have the 2001 bmw 330ci 5 speed manual P1341, P1343 and P1351 (cylinder 1,2 and 5 misfire with fuel cut off) I replaced the fuel injectors, spark plugs and ignition coils along with the ignition coil harness wiring, fuel pump, exhaust camshaft sensor, intake camshaft sensor, crankshaft sensor, mass air flow sensor, lower and upper intake boot, disa valve, both up stream exhaust oxygen sensors, cleaned the ICV... Fixed the vacuum hoses that were in the back and one that comnects below into a little air tank, i replaced the hose thats also connected to the F on the upper intake boot... Only thing i haven't got to yet is the catalytic converter 02 sensors and i have those just not installed.. please help. Misfire is so bad its terrible. And i can smell it too... Is it oossible my cat or cats are clogged? Hard to start up the whole engine is bogging... And moving cus the misfire is so bad

[@VoiresGarage]

vacuum leak under the intake manifold. there's also little nipples at the back of the intake manifold those might need to be replugged

[@jsolo7576]

Did you find the problem(s)?

[@chadriddle3517]

Nathan you got that e46 looking sharp

[@thatbmwguy1232]

I could use a little help with getting my e46 figured out. 04 325i 5spd. Started out throwing eml light under any kind of heavy throttle. Figured vac leak so we placed all the lines, pcv, ccv. Problem still there. We stepped it up and changed out the intake manifold, throttle body and disa all from a good parts car. Intake boots have been replaced as well as the maf sensor. Issue still there. Very odd thing when the maf sensor is unplugged the car runs great and doesn’t throw any eml code. Tuned ms45 ecu. Sap deleted catless headers with o2 sensor delete. Any suggestions or ideas what to do next?? Thanks for reading.

[@edva135]

Start with your ecu tune..

[@thatbmwguy1232]

@@edva135 problems were there before the tune.

[@m1nkFN]

Hey how did you solve the problem

[@BFitzy-c7b]

Thank you sir . Very easy to understand very knowledgeable i never subscribe to anything but I subscribed to you very impressive

[@moises8795]

I had a bad ignition coil causing misfire, replaced and now runs perfect

[@stevenbolton5967]

Will a bad maf sensor cause lean bank codes and misfire codes ? I’ve got all them at once all vacs seem good gonna try order a new maf but was just curious on that with the miss fire codes

[@tarzan30809]

Thanks Nathan! Could expand to the issues with the throttle position sensors in these cars? Thanks

[@alp6181]

This is one your best videos on e46, thanks!

[@toddkane3152]

Love the raw data dump vids.

[@pauledwards1157]

If you own one of these cars long enough and you have any mechanical ability, you’ll know this engine compartment like the back of your hand.

[@Triggered1x]

I just replaced my ccv and all hoses yesterday, today it threw a p0171 code which is better because i had multiple lean codes before but still annoying. No rough idle/misfiring great gas milage and power im leaning twards disa but im not sure any advice? Besides smoke testing

[@alanruiz6991]

you would have to vacuum test it, but If you want to check the DISA without doing that, just get some brake cleaner and spray some around the DISA where the O ring is and if you can hear the idle go up, then you got a vacuum leak there, it would also be that they didn't correctly plug back in a hose or a clamp is too loose etc

[@alsaku33]

"Gonna be stankin" Yes, yes indeed. Love your channel!

[@robbrcnstuff4220]

This was very helpful, I'm going to do the valve cover gasket and then go after the sensors on mine.

[@nikitoapriliano449]

Hey nathan, what do you think about hella for the sensor? Is it good?

[@nickg4135]

would you recommend buying an aluminium disa rebuild kit for a "while im there" kinda upgrade or buy a brand new one?

[@NathansBMWWorkshop]

Rebuild the one you have usually

[@dannynguyen796]

Hi Nathan 2004 BMW keys out idol control still runs ???

[@camdoggydog2238]

Does the throttle body ever tend to go bad having a eml light issue right now

[@kowal116]

Hi. I have high fuel trims at idle, rough idle in the morning. I made smoke test and smoke was coming out from this round thing at the back of DISA, can this small thing make +20% at idle? Thanks

[@felipebarrientos4675]

Hi Nathan, it’s a pleasure watching your videos. I’m having a common issue that’s has been all over the e46 forums, which is a low idle in drive and reverse. It’s to the point where the red oil light flickers sometimes when the rpm dips far enough. Would you say that is due to a vacuum leak even tho the car has no codes? Car runs great other than the low idle. Has 135k and I plan on going over maintenance. I already replaced the hard coolant lines, ccv, oil pan gasket and oil filter housing gasket.

[@coreytheecorey4056]

He said DISA valve would do that

[@fernandosaldana3665]

Did you have some e46 Transmission video? Mine is 323ci wont go fordard and reverse it’s like always in neutral sometimes goes reverse or forward but late and couple seconds after acceletating

[@NathansBMWWorkshop]

Check the fluid level, yes i have many transmission fluid videos up

[@bimmerelites]

So I Have 2001 Bmw E38 740il that had timing chain guide failure so I stopped driving since I didn’t have the funds to fix it but wanted to get to it but never did. I now plan to get it fix but now it won’t start. What would you advice if its been seating for 2 years that still has half a tank of premium fuel but doesn’t want to start like it chokes. No check engine light has new battery but now car won’t turn on whats my next move from here any advice or list what I should do.

[@chideverett9580]

Does it crank? If it cranks make sure youre getting spark and fuel if you are then compression test that hog

[@joshuastarling962]

Mine was running great parked it come out the next morning now it's missing real bad drove it down the road come back hooked up the scanner saying cylinder 2 misfire with code p0313 misfire detected low fuel do you have any experience with this code

[@tengzturiagaiii3185]

Hi, my e46, is boggin down everytime i press the gas. Only goes up to 2000rpm and boggs out. No power. It red P1145 reffering to solenoid valve running looses control curcuit. Is that the vanos solenoid. Because when i searched for solenoid valve. It comes up the vanos solenoid. Is it the vanos?

[@StyleGaragecc]

What about the throttle body any on that I found e46 that they say it maybe the throttle

[@sabz3one3]

Mine doesnt missfire but doesnt hold idle i have to rev it what could that be

[@isrealperez9069]

What about cylinder 3 misfire and I had a check engine light for exhaust valve I did change the sensors for the exhaust valve but it still running rough I believe I have a low compression on cylinder 3 which I believe might be because of the valves the exhaustive valves has a problem

[@TejinderJawandha]

How are you sir great video. I got 2003 325ci . It’s in limp mode code p1634,p1635 car running rough and no throttle any help Would be great thanks in advance

[@slant_f34rless92]

I have an 04 Bmw 530i with the m54, I haven’t started it in a couple weeks bc of a situation but I did a tune up with plugs and coils and replaced the battery, now when I went to start it the whole motor was shaking really bad and misfire nasty, what do u think this could be caused from

[@nickguerra1905]

i have a question is thier ways to upgrade those parts on the n54 engine to alleviate the problems with it

[@user-uq6vh3ps7m]

My 1999 528i m54 drops idle while its warming up, once it warms up its runs perfectly. What could it be?

[@caha9583]

I have the exact same issue. Did you find it?

[@matthews3547]

What headlights do you have?

[@jameschan1161]

my car has codes on misfire all cylinder, and idle rough. what should I change first

[@50matthewr]

I was told it might be my disavalve on my e46(330xi) but I get a nasty idle sometimes and then either we’ll idling or sitting at a light the car will randomly start miss firing and either chug too much air and not enough gas or too much gas, I have to turn the car off and on and then it’s fine…any opinions?

[@randomgamingyt9666]

Find any solution?

[@lorenzomays]

??

[@MexChefXpress]

Hey Nathan, Love your channel. Hey trying to figure it out issue with my 04 e46 330ci with issues stalling right after it warms up(10 minutes). Right after that I try to start it and it goes into Limp Mode. I changed MAF, new Intake boots, spark plugs, intake/exhaust camshaft sensors, TB, Cleaned ICA, DISA o-ring and refurbished. After it goes into limp mode it shows following codes: 2772 tank valve activation, 2796 throttle adaptation values incorrect, 5E19 CAN Data fault from DME.

[@jasonsanders6364]

Did you try it without your gas cap? If not, see if it does it without the gas cap on. If not, you need a new cap.

[@RubenBarron1]

I will try your suggestion but I got a new gas cap. Thinking DCM or injectors...

[@chellybabyme]

Does your heater work?

[@Kim_Sergey]

I have e39 with the m54b30, one day on the Highway I was driving about 60-70mph and went mid throttle and the rpm began bounce between 3-4K. Shortly after once I got off went from 1500-4K with out a problem but right after my check engine light came on and the car wouldnt rev past 2K. I haven’t gotten the chance to scan the code but could it be the coil packs ?

[@YeomanDesign]

Awesome video mate, I’m building a e46 at the moment as well!! Brilliant cars!!! 👌

[@qulsweet8647]

I replaced my spark plugs and got rid of my lean codes and i replaced my valve gasket. But i still have a misfire in my 1 3 5 6 cylinders. And i also got 3rd cylinder misfire with fuel cutoff

[@2ootiehamilton662]

Where are you located at

[@Freakwhencee]

Best videos Nathan- Dave

[@GrahamReid34]

Hi man what’s your thoughts on removing the mechanical fan and replacing it with an electric fan?

[@Dmxravin]

The viscous fan doesn’t run off your alternator so free horsepower right there. Unless you work on your engine a lot I don’t see any reason for electric fan.

[@joshuabrisson8860]

Need your help with my 325i 02 bmw

[@jairocamargo4563]

shot in the dark but maybe someone can help been having random misfire and hard start for a while and it ONLY got better when i disconnected the rear 02 sensor. replaced the usual. plugs, coils, smoke test, cam sensor, fuel filter and checked for leaks. what can it be?

[@alexphillips1885]

My car runs fine in open loop/ maf unplugged. But with it plugged in it falls on its face and throws advanced intake timing codes

[@cameronkelly3808]

you figure out what it was? having exact issue

[@alexphillips1885]

@@cameronkelly3808 I fucking wish. I’m going to throw cam pos sensor and a MAF once it get warm around here again

[@tradefarmacademy6874]

My car is not drivable it starts and then dies shortly after. I cleared the codes but now cannot get them back not sure what to do. Maybe a maf or cam/exhaust sensor?

[@SweatySantana]

What about misfire with the AC on at highway speeds & when you turn the car back on it’s perfect

[@kevinstorey9877]

Thanks Nathan awesome video

[@gytiskutka4775]

PLEASE HELP I got PO174, PO420, PO491, PO492. Then decided to clear the codes while car was running. Got scared by the sound and switched the engine off. After the starting it again it stalled almost immediately and now it idles on about 500 rpm and the car shakes. What should i do?

[@harryjohnson7714]

Still getting a misfire even though all of these are fine. Check pressure on cylinders as well. replaced plugs and coils twice. Nothing. At low RPM’s it’s fine but as soon as i go above 4500rpm it misfires on cylinder 5

[@randomgamingyt9666]

Hopefully someone can get back and solve my problem’s. 2003 330i having times where while sitting at a light car will get thrown into limp mode. A bit of a rough idle and black smoke upon start. Have to clear the code at times to be able to drive the car. Any ideas…??

[@w0rd06]

I have a 2001 bmw 330i that starts easily and drives smooth as butter but idles somewhat rough. im gonna watch this video when I get home from work

[@clarencetrinidad9149]

update on the cats?

[@zeee4869]

Thank you bro, my car always misfire 1 and i will chek it all

[@Ayixlia]

What about the idle control valve? would that cause a misfire?

[@martinez221704]

Take it of and spray throttle body cleaner and shake it multiple times. Flap is probably stuck.

[@bobirvin7991]

Im super stumped. Rough idle SOMETIMES. When it's rough idle, 80% of the times it progresses to dropping cylinder 6. I changed so many parts. I won't list them all. But the symptom continues.

[@jdob8086]

you verify injector pulse, fuel pressure

[@beneflaco]

Where is the map sensor?

[@DaltonM340I]

I’ll pay you to come fix my 325i lol dude it’s like a new sound everyday for this thing 204 thousand miles ran strong up until today runs and drives but makes a knock sound on start up and then just disappears as well sputters and mutters on start up kinda bogs then once warm is fine on top of that whole car vibrates oil/burning metal on metal type of smell ready to give up

[@elliottwalton671]

Misfire on 5 What could it be

[@tonythetigeryt7235]

P1083 how do I fix?

[@oniaschiwindo5183]

BMW E46 318i 2004 Car start but rough idle diagnostic show vvt error code

[@WayneParmer-q9c]

Thanks

[@jw_just_a_guy]

The cam sensors only last about 25,000 miles. It does not matter who makes them.

[@stuartingram7327]

P0505 code ?

[@kkKkk77777]

why not start the car to show us whats the sound and symptoms when is vacum leak…

[@AapVanDieKaap]

There were of course 4 cylinder models...

[@maxrpm4433]

Love it

[@郭余飞]

28A2 code

[@nicholas6706]

You should record in a 16:9 aspect ratio. This isn't good for an informative video since it's so cropped.

[@NathansBMWWorkshop]

These are all shot in 18:9

[@JuanTorres-pq8fd]

Bro said 525xi lol u did for get

[@teufelhunden2820]

FIRST!!!! Lol

[@cylonred8902]

5 series is NOT E46 - those are 3 series.

[@NathansBMWWorkshop]

hmm didnt say that, dont you think i would know that after over 1000 videos ?

[@andrewturner852]

Idk if anyone can help me with this or not but mine will misfire at idle after starting if i don't start driving very quickly after starting doesn't seem to happen while stopped at lights but when i park the car after i drive it it will also start to misfire only time it happens seems like a weird unusual issue and it only happens on bank 2 reading a lean code

[@TejinderJawandha]

How are you sir great video. I got 2003 325ci . It’s in limp mode code p1634,p1635 car running rough and no throttle any help Would be great thanks in advance

[@raymondbrett415]

change your MAF sensor