Developed a miss, Looking for ideas

[Jwade]

Hello All,
My 90' Coupe has developed what seems to be an ignition miss. It acts just like a plug wire or coil wire breaking down, is the same sort of stumble. However, it only does it when it's warmed up after I've driven it for a while. I have already replaced the cap & rotor, and the plug & coil wires (even though I couldn't see them arching anywhere). The car has fairly new plugs in it, Bosch Platinums with the quad ground straps.

I'm looking for ideas here to see if anyone else has experienced something similar? I'm thinking that it could be the coil, or maybe even the ignition module, however, in my experience those 2 usually just cause the car to quit running altogether...not a intermittent miss....but there's not much else for ignition parts left to change either.

Thanks for any help you can provide!

Jwade