Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2006 MDX 3.5L BACKFIRES and no.start › Reply To: 2006 MDX 3.5L BACKFIRES and no.start August 15, 2020 at 1:00 am #963028 Richard KirshyParticipant FYI… Just because the mechanical timing marks align does not mean the ignition timing is correct.