Why does your 2006 Lincoln Navigator sputter?

A sputtering 2006 Lincoln Navigator can be caused by several issues, including a clogged fuel filter, faulty spark plugs, or problems with the fuel injectors. Additionally, issues with the ignition system or a malfunctioning mass air flow sensor could also lead to sputtering. It's advisable to have the vehicle diagnosed by a mechanic to pinpoint the exact cause and ensure proper repairs. Regular maintenance can help prevent such issues from arising.