2003 Ford Expedition "rhymes blue" Questions

F-250 5.4 GAS MOTOR MISSES AT CRUISING SPEED How do I isolate the bad coil? Can I disconnect them one at a time when it is acting up to check for change, or is there a specific way to troubleshoot the

I have a 1987 Mercury Cougar xr7 / 5.0 and out of the blue wont start. Allow to sit for 30 to 45 minutes and its turns over without an issue. This happens every few days or weeks. I have a 1987 ...