Spark Test
WARNING: This page is about a different car, the 1990 Saab 9000 and 1990 Saab 900. However, it is still accessible from the selected car via links, so may be relevant.
Check for spark at coil wire (if applicable) and each spark plug wire using a high output spark tester. Check spark plug wire resistance on suspect wires. Resistance should be 2000-4000 ohms. Coil wire resistance should be 500-1500 ohms.