Car cuts out/ feels line missfire
Alright so i been dealing with this problem for about a month. I have a 08 335xi e90 with ar downpipes, afe intake, jb4. So i have been having it where i would just be driving it down the highway normal and once in a while if i get on it, the car starts to cut out or act like a fullpump going bad issue. Or possibly missfire. I had put it on map 7 with 93 gas and octane booster. It happened on that map and does it on all theres.
I got a smoke test done and have no leaks. I just got spark plugs and what going to check the ones in the car now.
Anyone with helpful advise pleaseee helppopp!!!!!!!!