Ignition System

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Check Crankshaft Position (CKP) sensor "A" and "B" for proper operation.
Check the Ignition Control (IC) circuits at each ignition module assembly for poor connections, damage, misrouting.
Check the ignition coils for damage.
Check the spark plug boots for misalignment, and damage.
Check for a damaged or missing ground spring at each ignition module assembly.
Check the spark plugs.