Stupid question: Have you tried unscrewing and trimming the end of the HT (high tension) lead to the plug?
My 208 was doing this weak spark thing and being hard to start, I checked and reset the airgap on the coil and a new plug before deciding to do that... it was the issue the whole time.
They may be glued in place but they all screw into the ignition and the cap until changed/upgraded depending on what you used