Honda Civic RPM fluctuates erratically while driving, engine dies but cranks back up repeatedly on Honda Civic

Some Honda Civic owners report experiencing erratic RPM fluctuations while driving, along with the engine repeatedly dying but cranking back up. These issues may stem from a faulty ignition system, which can lead to RPM fluctuations if engine compression is low. Additionally, some owners have reported that faulty transmission can contribute to these RPM issues, particularly in automatic vehicles where gear shifting is controlled. A defective Idle Air Control (IAC) valve has also been noted as a potential cause of RPM fluctuations, engine stalling, and rough idling. Furthermore, a clogged air filter can disrupt the air-fuel ratio, resulting in inefficient engine performance and similar symptoms. Underinflated tires and aggressive driving may add stress to the engine and transmission, exacerbating RPM fluctuations. Lastly, worn-out spark plugs can lead to engine misfires, causing vibrations and further RPM issues. It is recommended for owners experiencing these symptoms to seek inspection from a qualified mechanic to accurately diagnose and address the underlying problems.