The three coil wire connectors are usually what cause a misfire. It is almost never the coil wires or the three high tension leads that piggy back to the next cylinder.

Search for posts by Arthur Dalton. He has posted frequently on misfire issues for your engine.

Here is one post:

"The wires can cause your problem, but they are the last place to look.
The problems with mis-fire on 104 Waste Spark ignitions is the connector/resistor UNDER the coil...that is just the way it is b/c they have an inferior connecting system and are heat trapped.
Any Tech will tell you to change them at a plug change b/c of their frequency of misfires.

So, that is the FIRST recommend , but not a diagnosis..it is a 'Change them regardless " recommendation b/c of their know failure rate.

And don't make the all too common mistake of moving the coils and watching the codes to move with the coil WITHOUT pulling the connector off the suspect coil..I see guys swap coils for that valid diagnostic trick , but they leave the connector on the coil they are swapping, not realiziing that it is the connector that is following the code . not the coil..
So , they buy a coil when all they needed in the first place was the connector under the offending coil."

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".