Your 1998 Lincoln mark viii lsc seems to run rough and has a rotten egg smell plus the check engine indicator light is on It runs with a stumble what's causing this?

Answer 1

Replace the oxygen sensors. This should eliminate the 'rotten egg' smell. If the engine has lost power, the converters may need replacing. Though there may well be an electrical problem, a partial collapse of an exhaust system component could restrict airflow enough to cause the engine to 'run rough'. The rough running is an electrical misfire in the engine. The egg smell is the catatytic converter disolving with raw fuel going into it. You will have to check plugs, leads, cap and rotor arm for wear or damage. Dont drive this vehicle because you will have to add the cat converter to your shopping list too. Hope this helps