technical f30 335i sputters on cold start

[Liam H]

So to all the guys who replied to my previous post, I spoke too soon!

So after I had my sparkplugs replaced, the car drives excellent, smooth idle and accelerates like a dream. This morning however, when the car had it's first coldstart after replacing the plugs, I noticed the car sputtering (not sure if its misfires). Could this be from incorrect gap? I asked the place who got me the plugs and put them in, to gap them to 0.022" as you guys told me to do, but something tells me they didnt.

I'm starting to lose my mind lol!

 

[Liam H]

In the video, you can hear it even better with earphones, Note, as soon as the cold star is over, it's smooth

 

[Teezoh]

Pretty sure it's a MHD thing, could be with the additional settings like startup roar etc

If it goes away after the cold start and you logged the car with WOT with no problems, I would not break my head.

If you really want to troubleshoot it, map to stock with no settings and see what it does. If it goes away, slowly get back to you map with one setting at a time. Will take long since the car will stop cold starting unless you keep interrupting it.