My '97 Explorer has developed a starting issue in cold weather. I turn the
key and it starts immediately, runs for a second or two and shuts off. I
have to repeat the process numerous times before it will stay running. At
first, I thought the battery voltage was sagging because ...

I'm looking at buying a 2002 Expedition with low miles but before I
do, I'm wondering were there any major changes or improvements
introduced after 2002 that I would be missing out on? I could afford
maybe up to a 2006 but would prefer to save money by buying the 2002

Im having a problem with the engine, one time when i was driving on
heavy snow, i switched to 4WD high, after a moment the engine starts
making some noise and i started to smell something burnt. The noise on
the engine wont go away and im worried to drive it. I know something