My 329D serial #1T0329DKPA0191134 with about 3000 hours has started missing when cold, it typically quits after it warms up. It's quite noticeable and I'm worried it's a symptom of a bigger problem coming. There are no active or stored codes from when I cleared them a couple months back. Any suggestions on where to start looking ? Thank you,
When it is misfiring, shoot exhaust port temperatures to see if you can narrow down which cylinder it is. If you have or know someone with Service Advisor, then a cylinder cutout test or a misfire test can be performed. Check your messages.