Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › a/f ratio › a/f ratio February 24, 2012 at 11:00 am #442868 EricTheCarGuyKeymaster +1 on Dreamers post (I should get a stamp that says that). It sounds to me like a possible ignition problem as ignition systems often fail under load and when you put it in drive a load is created on the engine by the transmission so it’s worth doin