2003 Ford Expedition XLT FX4 broken coil pack
Hello, I'm new to the forum here and just purchased a 2003 Expedition XLT FX4. I had already test drove the vehicle and it ran fine, but this morning on the way to work the motor began misfiring and sputtering right around 55 to 56 mph with the throttle held at a certain point. Dealer came and got the vehicle, took it back to the garage and found a broken coil pack. They replaced it, I test drove it again tonight and it ran great. I went ahead with the purchase, I hope I made a good choice.
Any advice for routine maintenance other than changing oil to keep this thing on the road and out of the repair shop?