[Josh-PA]

Hi All,

I've had an issue with my 2011 e88 N55, no mods, 145k miles, for a while now that seems to finally be getting a little worse.

At cold start up (first time of the day, engine at ambient temperature) the car starts quickly without issue, but will have a 'stuttery' misfire for about a minute until it warms up a bit. On a very rare occasion (like one out of 100 starts) it will stall, but start right back up. Until recently this would not trigger any codes, just a couple of misfires then everything settles in fine.

For about the last 3 weeks, I am getting a check engine light on about every 3rd start with the following carly codes:
002EFE Combustion misfires several cylinders detected
002EE2 Misfire, several cylinders, damaging exhaust gas after starting up
002F0(X) Misfire, Cylinder X: Detected - i get individual codes for each of the six cylinders
002Ef(x) Misfire, Cylinder (x): damaging exhaust gas after starting up.

The cylinders listed are different on the various times I pull the codes, but usually ~3 cylinders are listed. The last code I pulled had cylinders 1, 4 and 6 listed. The time before that it was 3, 4 and 6.


The coils and plugs are OEM and relatively new (25k miles) and since it is happening on all or almost, I'd be surprised if that is the root cause. I did move some coils around and it didn't change anything.

The research I've done so far suggests maybe leaking injectors (they are original), but would it make sense that they are all leaking a little? I thought maybe HPFP, but it doesn't make sense that after a minute of warm up everything runs great. This one has me stumped and I'd really appreciate any help, suggestions or things to try.

Thanks in advance - Josh

[Netzke98]

I replaced my injectors to fix the cold start misfires. They had 135k km on them. What’s your lpfp and hpfp pressure on start up?