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what is the max resistance on a 4.7 grand jeep cherokee coil pack
A coil pack can be checked for continuity and resistance with an ohm meter. But for heat or load failure the only way to check a coil pack is to replace it.
If you have an Ohm meter you will want to measure the resistance (ohms) of the Primary and Secondary sides of the coil pack and compare your readings to the Specifications for the vehicle.
On the Millenia, each plug has its own coil; there is no distributor. The coils are connected directly to the spark plugs on each cylinder.
The coil pack could be weak, or break down under load or heat. The coil can be basically checked with an ohm meter for resistance, but the only way to know for sure is to replace it.
Coil packs can not be checked for heat or load related issues. They can be checked for proper resistance with an ohm meter.
The spark is looking for the easiest path to ground, you might have an issue with either your plug wires or plugs that is causing too much resistance. Also your coil pack might be going bad.
If it is on a 1996 Mazda millennia or similar year model, the coil packs on the 2.3 engine on the front are simple. If they are on the back this is a little tricky getting to them. Some wiring harnesses need to be moved around.
what is the number coil pack
Coil packs can be checked for resistance with an ohm meter. If the pack is breaking down due to load or heat problems then the only way to check is to change it out. If the Windstar is a two pack model then you can swap the packs to see if the problem follows the cylinders that the possibly bad coil pack are now controlling.
Follow the wires from the spark plugs and they will go to the distributor unless the engine does not have one and has a coil pack.
Make sure the power supply from the connector plug into the coil pack is correct and functioning. Also check the resistance of the coil pack with a digital ohm-meter to make sure it has no external or internal short circuits. If all this checks out OK, then the problem you are having is from somewhere else.