running rough on 2004 Ford Freestar

Changed the spark plug coil pack wires and plugs ran great for a week now its running rough again. Please help!!

Asked by for the 2004 Ford Freestar
2004 has On Board Diagnostics level two (OBD2) with pretty good in built diagnostics that require a scan tool to retrieve information stored in the computer of your car. Has a Check Engine Light come on or what was the code stored that prompted replacing the ignition components?
If it ran good after components were replaced ensure wiring connections or vacuum hoses have not fallen of in the engine compartment. So many things could be responsible for making the engine run poorly it is hard to speculate without being able to drive the vehicle or perform some tests first hand.
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Rough like how? Go to town hall on and look up 2004 Ford Freestar engine problems. You'll be amazed if this is your problem.