Buick Lucerne engine misfires and stalls unexpectedly with no failure codes, suspected electrical issue on Buick Lucerne

Some Buick Lucerne owners report experiencing engine misfires and unexpected stalls without any failure codes, often indicating an underlying electrical issue. These misfires can lead to rough idling, stalling, and poor acceleration, which may be caused by problems in the fuel system, air intake system, or ignition system. Additionally, symptoms such as excess vibration and decreased fuel mileage are common indicators of a misfiring engine. It is essential to accurately diagnose the root cause, as misfiring may signal a larger engine problem. Owners are advised to check the Ignition Control Module (ICM) ground wire for wear or damage, as a faulty ground can contribute to stalling issues. Ensuring that all electrical connections related to the ignition system are secure and corrosion-free is also critical for maintaining engine performance. If the engine exhibits pinging or rattling noises, it could suggest early ignition of the air-fuel mixture, further pointing to a potential electrical issue. Addressing these concerns promptly is crucial to prevent further damage and ensure optimal vehicle performance.