Thread: Misfiring / stumbling at higher RPMs (video link)

I have had my 97 GTP for 7 years with no problems. Only routine stuff such as oil and brakes. In the past couple of weeks I have developed a significant misfire at 3.5k rpm - to redline. No check engine light. Replaced plugs, coil packs, fuel filter....no improvement. Anyone have any guesses or possible solutions? Keep in mind the video below actually shows less of a misfire than usual. It can be quite a bit worse.

https://www.youtube.com/watch?v=i0rEoN3aMXM

What kind of plugs did you put in it? Also, why not replace the wires? Could have damaged one (or more) when pulling them off the old plugs. Do you get a flashing CEL when it happens?

autolite 104s at the correct gap for a 3.4 pulley + supporting mods car. Wires will be next! No flashing CEL though.