Mazda B4000 engine stalls while driving at freeway speeds, restarts in neutral with no codes on OBD1 reader on Mazda B4000

Some Mazda B4000 owners report experiencing engine stalling while driving at freeway speeds, with the engine able to restart in neutral without triggering any codes on an OBD1 reader. These stalling issues may be linked to the fuel system, where problems such as a clogged fuel filter or a failing fuel pump can prevent sufficient fuel from reaching the engine. Additionally, some owners have noted that issues in the air intake system, particularly a malfunctioning Mass Airflow (MAF) sensor, can lead to stalling even without generating OBD trouble codes. The ignition system may also contribute to these problems, with faulty spark plugs, ignition coils, or the ignition control module potentially causing stalling at high speeds. Furthermore, difficulties related to idle control, such as issues with the Idle Air Control (IAC) valve, can also result in engine stalling. Lastly, some owners emphasize the importance of checking for leaks in the fuel pressure system, as components like the fuel pressure regulator or injectors can lead to stalling if not functioning properly. It is crucial for owners experiencing these symptoms to thoroughly inspect these systems to identify and resolve the underlying issues.