you don't until they give you problems or they burn out
there is no need to change the coil packs just to do routine maintanence
NO!
Coil packs are an essential part of an automobiles engine, therefore, you would commonly see coil packs with commercial vehicles. They are a key component in the starting of a vehicle as it aids in the sparking of the engine.
On what vehicle with what engine?
Change out coil packs
Thee is no distributor on vehicles with coil over plug packs
If it is a newer vehicle it most likely has coil packs not a distributor. Follow your plug wires and see where they go, if they go into black boxes they are coil packs.
they are under the coil packs which are in the top of the valve cover, unplug the coil packs, take out six bolts, the wires should come out with the coil packs and you will have access to the plugs.
Depends on the vehicle. Give us more info.
Only if there is a problem with the coil pack(s).
No.
The plugs are under the coil packs that are on the passanger side of the vehicle. This is of course if you have the 4.0 engine. I would need to know more about your vehicle to gie you the best answer.