my 95 z28 has a misfire, i used a ignition tester and all the plugs are getting fire but one, it has no spark at all anyone else had this problem. I don't won't to mess with the opti-spark unless i have to. any information will be helpful.

 

Swap in another plug and wire from a cylinder that works. If it still doesn't have spark. Sorry, there's only one fix for that.

 

my cars having mult cyl misfires, i changed four of the plugs, the easy 4 i still gotta change the other 4, but im with you i dont wanna touch the opti unless i have to.