I am trying to fix my brother in law's 2002 Saturn L200 with the 2.2 4 cylinder. It has a misfire in cylinders 2 and 3 so I know it is either the ignition module or the coil packs. How can I tell which one? I would normally think it would be the coil packs but there was a recall for the ignition module, which was done on the car in 03, that has the same symptoms.