How do you know when ignition control module in 1998 Buick century is bad?

You can determine if the ignition control module in a 1998 Buick Century is faulty by checking for symptoms such as engine misfires, stalling, or difficulty starting the engine. Additionally, if you experience a lack of power during acceleration or if the Check Engine light is illuminated, these may indicate an issue. Testing the module with a multimeter or a diagnostic scan tool can also help confirm if it’s malfunctioning. If you suspect a failure, replacing the module is a common remedy.