About at the end of my patients. On a trip to fl lost power and ran horrible. Repaced 1 coil pac and all plugs. Still ran rough but got us home. Since then I've switched coils,fuel injectors,plugs. Now cant pass emissions. Very little heat in cab and smell of anti freeze. Also losing oil ,no driveway marks. 2000 expedition 8th digit 6. Please help!

 

Sounds like a blown motor. Do compression check on all cylinders. This should have been done first.