Diagnostic Aids
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.
The Misfire Current Cylinder counter normally displays a small amount of activity, typically 0-10 counts. However, the display should not increment steadily. If the Misfire Current Cylinder increments steadily for a single cylinder, the condition is isolated to the IC control circuit for the specific cylinder. If the Misfire Current Cylinder numbers increment randomly, the connection may be due to poor connections at the PCM, or due to a faulty PCM.
If the condition is intermittent, see INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.