[PrematureApex]

Exact same issues here. '14 N55. Any luck with the cold idle stuttering and the gentle Crouse random misfire?

[jkwhar]

Originally Posted by PrematureApex

Exact same issues here. '14 N55. Any luck with the cold idle stuttering and the gentle Crouse random misfire?

Back to searching and came across my own profile lol. Now that the cold temps are back in the north east, my f15 is doing the "runs like crap for the first few minutes", it feels like a combination of misfire and engine bogging/stuttering.

At the moment, just living with it until I have some time lol.

[jkwhar]

Originally Posted by jkwhar

^^ that was fixed with a new MAF sensor.

Update, since the cold weather is back, MAF did not fix the issue.

[f30_335i_ca]

Not sure if my issue has anythitng to do with others... my N55, cold starts were fine, hot start it was wanting to stall and recover itself, so surging. Idle would settle after 10-20 seconds, then drove normally.

My heavy VSRF IC was sagging as the factory plastic threads holding it broke.The IC hose clips were still in place. I installed 2" steel angle brackets to support the IC in its proper locaition and my problem went away.
i think this was causing a samll air leak, the cold start enriches fuel overcoming the leak, when hot I had issues.

I know the OP mentioned doing smoke test so maybe a diifferent issue, just sharing my experience.