Hey guys, I have a 2017 ST with 12,000 miles on it. I'm currently towards the end of my tuning process with Mountune and have begun to develop misfires only on cold starts at idle. I receive no check engine light but you can audibly hear the strong "popping" from the exhaust that was never there before. Car runs great and pulls through the gears very well and idling while warm is also no issue. AFR during cold idle hangs around 15.5 and stays there until about 30 seconds of road driving before returning back to 14.55-14.7 . Tomorrow I will pull all plugs and inspect their gap and condition and I will then do a compression test (wish me luck). If the issue is not resolved is there anywhere you guys can point me to for these symptoms, couldn't find anything else on the forum even after quite a bit of searching that fit these specific symptoms...
Modifications
-Whoosh Catless DP
-Mountune Panel Filter
-Turbosmart ATM BOV
-Radium Engineering PCV Catch Can
-Cobb AP with Mountune 93 oct tune
Modifications
-Whoosh Catless DP
-Mountune Panel Filter
-Turbosmart ATM BOV
-Radium Engineering PCV Catch Can
-Cobb AP with Mountune 93 oct tune