my missus megane is playing up again im pretty sure its another coil.

is there anyway i can find out if it is a coil without plugging it into a diagnostics machine? baiscally the car is juddery at certain revs say between 2-3000 then after the 3000 revs its fine. and at that point there is no power till after the 3000 revs.

the problem isnt there at idle so not sure if i can disconnect coils to find the problem this way?

any help would be much appreciated thanks