Any thoughts? I replaced my coils about a year ago. Read a lot about changing sparks and possibly dirty or bad injectors. It’s a x435i(N55) and is sitting at 79k miles. Never replaced plugs. Last time they were changed was 4 years ago. It’s on a stage 2 bootmod3 tune with intake and catted pipe and charge pipe. Everything has been flawless with the car other than it rough idling when first started for about 10 seconds and then drives great. No loss of power, no codes on dash and screen. Heard and read this can either be really simple or a money pit. Gonna upgrade to NGK step 2s as a first step. The car definitely sounds like it has a misfire on start up so hoping it’s just as simple as a spark plug change.