Just purchased a 2000 Mercury Villager two weeks ago with 90k miles hoping to be a reliable vehicle. My wife has driven it occasionally since it was purchased with no problems until 2 days ago it squealed when started and has done that a couple times since but I chalked this up to belts being loose/tight. And then I drove it to the store yesterday and it started fine but at the first light it acts like it wants to stall and it has done that ever since. Doesn't sputter while not in gear but as soon as I put it in drive or reverse while brakes are engaged it sputters like it wants to stall out. At first I thought o2 sensor or fuel filter or fuel pump or injectors but it has no service lights on.... Does this have any connection to distributor? Can anyone help shed some light on potential problems? Hoping this is a simple easy fix....