Just a note, if your coil is still on the side of the engine, Move it !!!.
Its probably in the worst position possible on the side of the engine, and the heat and vibration of the engine cook it and dislodge the low tension wires.
Not much good if your stuck in the services on the M62 with 2 small kids on the hottest day of the year, with the aa saying it would take 2 hours to reach me !!