Hello,
I have a 99 5.4L 4X4 expedition with 138,000. I have had a plug blow out, a few coil problem, no front wheel drive (i'm scared to ask) and now I just had to bypass my heater coil because of leak. Where can i get a good coil at a good price? I love my expedition it has been great to me and pulls the boat like its not even there.

 

Try calling around to local radiator shops, looking for a copper or brass core. It'll cost a little more, but the increased durability and resistance to electrolysis is worth it.

 

For as much work is involved in changing the core, price would not be an issue I would be looking for quality and warrente.