Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Lean or rich condition? Confused › Reply To: Lean or rich condition? Confused August 5, 2020 at 3:41 pm #962371 Dave TidmanParticipant I would look at your fuel trims with live data, that will tell you which way it is running. Do you have an codes from the ecm? Here is a good short video on fuel trims: