I did all 8 of mine in about 1hr 15min taking my time. they are not as bad as some make them out to be. I would suggest anti-seize on the new ones and proper torque. Search the 97-03 forum for a thread on how to replace your spark plugs. It is a very detailed write up on the procedure.

 

Need some guidance. A elderly couple need me to try and fix their 2000 Ford Expedition with the 4.6 V8. The elderly gentleman changed the thermostat hoping to fix a no hot air from heater. This did not fix the no heat problem but the next time they drove the vehicle it had low engine power. They had it checked at autozone with a scanner and it sets misfire codes for cylinders 5,6,7, and 8. Could this be a coincidence that all 4 went bad at the same time or is there a fuse, harness or what that may be causing this problem.