[alexcapi]

Hi, my N54 runs extremely rough and seems to run rich. I get many misfires whilst idling. Could someone look at this short idle log and find the problem?

https://datazap.me/u/alexcapi/n54-idle?log=0&data=14-21

[AWD Addict]

Start with the usual suspects.

Plugs, Coilpacks, injectors, etc.

[Bimmer_Bro]

Originally Posted by alexcapi

Hi, my N54 runs extremely rough and seems to run rich. I get many misfires whilst idling. Could someone look at this short idle log and find the problem?

https://datazap.me/u/alexcapi/n54-idle?log=0&data=14-21

Start with plugs and coil packs as suggested already. I would then also replace all vacuum lines if you haven't yet.
I would not replace injectors unless you are sure that is the problem. They are 4grand for a set of 6.
Leaking injectors is a common issue but you want to be sure first. To diagnose a leaking injector, park the car overnight. The next day DO NOT START the car. Pull the spark plugs out one by one and check if they are wet with fuel.

[AWD Addict]

Originally Posted by Bimmer_Bro

Start with plugs and coil packs as suggested already. I would then also replace all vacuum lines if you haven't yet.
I would not replace injectors unless you are sure that is the problem. They are 4grand for a set of 6.

Leaking injectors is a common issue but you want to be sure first. To diagnose a leaking injector, park the car overnight. The next day DO NOT START the car. Pull the spark plugs out one by one and check if they are wet with fuel.

$4,000 for injectors?!

No.

https://www.turnermotorsport.com/BMW...fuel-injectors

[Bimmer_Bro]

Originally Posted by AWD Addict

$4,000 for injectors?!

No.

https://www.turnermotorsport.com/BMW...fuel-injectors

That site is wrong. Those are for a n55 not a n54

[Bimmer_Bro]

Originally Posted by AWD Addict

$4,000 for injectors?!

No.

https://www.turnermotorsport.com/BMW...fuel-injectors

Sorry 3k
Over 4K Canadian

https://www.fcpeuro.com/products/bmw...-13538616079kt

[Dave92N54]

Originally Posted by alexcapi

Hi, my N54 runs extremely rough and seems to run rich. I get many misfires whilst idling. Could someone look at this short idle log and find the problem?

https://datazap.me/u/alexcapi/n54-idle?log=0&data=14-21

Looks to me like bank 2 is lean popping. You can see the small spikes in the AFR mostly on bank 2. Bank 2s trims are also adding fuel so this makes sense.

As already said, check your spark plugs. Then coils. If any of your spark plugs are very black and smell of fuel, i'd bet you have a bad injector.