[mweisdorfer]

Originally Posted by avityvan

I replaced all 6 coils with BMW Direct Ignition Coil - Bosch 0221504465 and also replaced injector 2 but is still have cylinder 2 misfire. I don't know what else can it be.

I don't understand what you mean 11 & 12 in the same bank.

Thanks for the help, much appreciated.

Bank 1 are cylinders 1-3, Bank 2 are cylinders 4-6.

1 - 11
2 - 12
3 - 9 = no good

1 - 11
2 - 11
3 - 12 = good

You can't go below 11 in a given bank

You can -

1 - 11
2 - 11
3 - 12

4 - 9
5 - 10
6 - 9 = no issues because they are separate banks

The numbers of course like 11, 12 etc are the index numbers of the individual injectors

[beetle6986]

Originally Posted by beetle6986

Car passed blown head gasket test.

However, I think I had a break through today with some with something else. I pulled fuse 26 which disables the awd system. The car does not misfire with this fuse out. So I believe it isn’t actually a misfire. I think the issue is related to the transfer case or the 4x4 system. It just feels exactly like a misfire.

I figured I would give an update. I hate when people have problems and post it in a thread and then never give the final resolution. I changed the transfer case fluid and the differential fluid. The issue is now 90% better. I’m hoping as I drive it more with the new fluid the issue will go away completely. Otherwise, I will put in a replacement transfer case.

[XxPotHeadxX420]

This helped my newbie butt out alot. #NewMember

[Budi]

Great info

[Chrisred]

Hi, I keep getting ALL cylinder misfires on WOT only above 5000rpm.

Have RB turbos on 100% meth, FBO, upgraded LPFP.

Tried NGK 2 step and 1 step colder plugs and stock plugs. No change

New coils. Bimmerlife.

Injectors are index 12. Have replaced cylinders 1-2-3. Same results . Doesn't seem like I have issue there as no morning misfires due to leaks. And misfires are always on different cylinders or in ALL cylinders. Coded well and decouplers in place.

Carbon cleaning done as well.

Logged HPFP & LPFP with Trebila and everything is perfect. Logs are perfect until misfires.

Have stage 3+ spec clutch and flywheel.


No other codes. Just the misfires on several/All cylinders.

O2 sensors fairly new.

Any ideas.?? Anyone??

[335xirookie]

Spark plug gap maybe? prob should be 18-20...Or maybe time for Bimmer life coils...

[Chrisred]

Originally Posted by 335xirookie

Spark plug gap maybe? prob should be 18-20...Or maybe time for Bimmer life coils...

I currently have new stock plugs. Believe they're not gappable. But either way my mechanic had gapped all my plugs correctly in the past.

[jasonytl1]

Hi, I am from Hong Kong, I have did a lot of review before try to flash my car with MHD, and I finally decide to flash it today, but my flash didn’t went well and my car can’t turn on anymore, this is the process of my flash, hope that you can help me.

First, I have my battery connected to my car, then I pug in the K+DCAN cable, it connect successfully, I purchases the flasher module and stage 1 map, then I go backup my ECU and start flash the map. Firstly it go well, but then it stuck at (15%, 31min) left. I wait for more than 1 hour but it still stuck at 15%, so I have choices to unplug the cable, then I restart the phone and ofcause my car can’t start anymore.

After my phone restarted, I try to flash my car back to stage 0, the MHD app go well and start flash back to stock, later on, it stuck at (89% 2min) left again, after half hours, I have no Choice to unplug the cable again. Finally, the MHD app no longer connects to the ECU, I try with the same cable that I have used and it said no cable detected. That is all the process of my flash, hope that you can give me some help, thanks.

[Sherbakoff]

Can JB4 be used only as meth controller?
No need to use different JB4 maps because I have custom ECU program.

[CheesecakeInjection]

Originally Posted by Sherbakoff

Can JB4 be used only as meth controller?
No need to use different JB4 maps because I have custom ECU program.

JB4 compatible meth kits come with a little FSB module. when it has FSB it can control it and have its meth failsafes connected.

if it doesnt have FSB it'd be tricky to rig up.

[rwphillips7]

I own a 2008 335i, I'm experiencing a single misfire on cylinder #2. Replaced spark plugs, swapped coil pack and fuel injector but fault didn't follow. Cylinder 2 still misfires. I've been working on this problem for awhile...not sure what else to do. Ideas?

[alexwhittemore]

Originally Posted by rwphillips7

I own a 2008 335i, I'm experiencing a single misfire on cylinder #2. Replaced spark plugs, swapped coil pack and fuel injector but fault didn't follow. Cylinder 2 still misfires. I've been working on this problem for awhile...not sure what else to do. Ideas?

The one thought that jumps to mind is: what if the wiring to your cyl2 coil is broken? Maybe the plug and coil are fine but it's as if the coil isn't plugged in.

I'm not sure how to easily verify that though.

[whyzee125]

Originally Posted by rwphillips7

I own a 2008 335i, I'm experiencing a single misfire on cylinder #2. Replaced spark plugs, swapped coil pack and fuel injector but fault didn't follow. Cylinder 2 still misfires. I've been working on this problem for awhile...not sure what else to do. Ideas?

Has it ever been carbon cleaned? Can you clear the misfire? How soon does it come back? Can you feel it/is it shutting a cylinder down or it's minor enough that it drives ~normally? How many miles on the car?

[N54_wagz]

Misfire on cylinder 2&5 after about 5-10 mins of driving, I’ve done new plugs, injectors and coil packs, injectors have also been coded, help

[citrina]

Guys, i bought new bosch spark plugs to replace old ones. The old ones had three prongs, new one have single. I installed the new plugs, runs fine, but if the engines more than 3k revs it starts to trail. Wrong spark plugs or i did something wrong?
The engine is stock.
EDIT: Bosch 0242145515

[SeanS97]

Car: 2009 335i N54

Cylinder 6 misfire. It does not fire at all in cylinder 6.

Code: 29D2

Checked/swapped coil pack, spark plug and injector.

Swapped them all around and misfire remains at cylinder 6.

It worked for 5 mins (low load driving) before completely failing again.

Compression test checks out.

Injectors have been tested.

Please advise.