Today, ignition control is directly controlled by the engine control module (ECM), the primary computer in the car. But what if the ICM goes bad? What are the symptoms of bad ignition control module? The spark plugs are ignited by the ignition module. For the engine to function properly, each spark plug must ignite at the precise moment. When to ignite the spark plugs is decided by the ignition module using information from the crankshaft position sensor or camshaft position …
