Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › RE: 2006 3.5L MDX cranks no start but back fires › Reply To: RE: 2006 3.5L MDX cranks no start but back fires August 29, 2020 at 2:18 pm #963404 Richard KirshyParticipant My suggestion would be to scope the engine … Do a relative compression test and check the ignition timing. The last couple of minutes of the video will show you the ignition timing compared to TDC compression