All I know about it is
It's not an injector(swapped)
It's not a chipped cylinder(compression test)
it's not a plug(swapped and gauge checked 3 times)
it's not a wire(swapped)
it's not a coil(swapped)
It's not a ICM(swapped)
and cleaned MAF
problem is confined to cylinder 3 regardless of components
the problem is intermittent at best nowadays seemed to get alot better after switching to 93 octane
could bad gas alone cause a misfire?
problem occurred after doing headers and plugs
could a bad exhaust leak cause a misfire?