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  1. F21 Sooty Exhaust Pipe

    BMW 1 Series - Tech Talk For All Gen Of 1 Series
    Hi, I have an F21, 1 Series 125i, 65 plate, with 25k miles. I have noticed that the inner exhaust pipe is very sooty, the outer exhaust pipe is clean. Anyone else with an F20/21 petrol engine car noticed this? Any ideas, please let me know. I think I will take it to BMW in the New Year.
  2. 2008 E91 330D - sooty exhaust. Reasons?

    BMW 3 Series - Tech Talk For All Gen Of 3 Series
    Hi There, My 330D has sooty tailpipes. I gave them a bit of a clean last weekend but the soot has returned. I was expecting with a DPF car that the tailpipes should be quite clean. I am in the process of getting the stats changed. Could this soot be accounted for by the car running rich? Or...
  3. E92 335d (Pre LCI) DPF issues - sooty exhaust, low power

    BMW 3 Series - Tech Talk For All Gen Of 3 Series
    Hi Everyone, I recently bought a Superchips Bluefin for my 335d, about a month / 2500 miles after flashing my ECU I noticed some soot appear around the exhaust tips. Previously it had always been very clean, as you'd expect from a car with a DPF. There have been no warnings displayed on the...
  4. 1991 E34 535i sport Sooty spark plugs

    BMW 5 Series Forum - Technical Talk on the BMW E12
    SOOTY SPARK PLUGS ON E34 535I SPORT. The plugs are looking a little sooty to be honest and I have been reliably informed that this could indicate certain issues and I believe one of these could be too rich fuel mixture. What can I do too address this issue? Thanks in advance.