N54 combustion misfire

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Majin

New Member
Mar 20, 2019
4
Hello everyone, I'm new here.
I've been having a big dilemma about my e92 335i.
Had the car for about 1 year now on 105k miles.
Car had new turbos about 8 months because old ones where smoking like a train.
Bought decat downpipes, has a charge pipe, and mhd stage 2+ tune on it.
Car started doing combustion missfires while cold, and trowing codes for cylinder 1, 2 and 3, then sometimes only just 1.
Have tried new plugs, checked the swap around the coils, no luck what so ever.
Car is in garage as we speak getting new seals in the turbos inlets has the person who put them on before didn't use new seals
Can't be the fuel pump has it stinks like fuel and smokes alot when it's cold started.
I smoke tested it and there was alot of smoke coming from the turbos area, mechanic found a intake pipe for the turbos that wasn't on properly and was leaking, could that be the issue?
Any help would be much appreciated.
Thanks
25245
 

NoQuarter

Captain
Nov 24, 2017
1,150
Indiana, USA
Do you know how old or which version of injectors you have? Also, remember those injectors are in the same bank so all 3 cylinders are affected one way or another
 

Majin

New Member
Mar 20, 2019
4
Do you know how old or which version of injectors you have? Also, remember those injectors are in the same bank so all 3 cylinders are affected one way or another
Okay, I'm pretty sure they are index 3? I can't tell for sure. Any software that will test the injectors? Or any way of testing them?
 

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