Your 1998 ford expedition is sputtering and smells like anti-freeze you changed the coils and plugs a few months ago but now its happening again?

If your 1998 Ford Expedition is sputtering and smelling like antifreeze, it may indicate a coolant leak or a problem with the head gasket. Check for any visible leaks around the radiator, hoses, or engine, and inspect the coolant level. If the coolant is low and there are no visible leaks, a blown head gasket could be allowing coolant to enter the combustion chamber. It’s advisable to have a mechanic diagnose the issue to prevent further damage.