Originally Posted by Bert
The coils can cause that, even with a good test of the resistances.
Would it only have a misfire on one cylinder? The Escort has a waste spark ignition system so it fires two cylinders at the same time, one on the compression stroke and the other on the exhaust stroke. If I remember correctly it fires 1 & 4 at the same time.
After re-reading my previous post I need to clarify. The 10 volts should be on the center pin of the wiring harness with the ignition off not the center pin of the coil. Hopefully now that I've cleared that up it will help.
I'll check the thread again tomorrow and if there's no other suggestions. I might pull the coil off my '97 Escort and put it on the '02 to see if that resolves the problem.