The throttle of the shepherd engine is intermittent.

Why is the throttle of shepherd's engine intermittent? Throttle actuator failure or air flow meter failure.

Throttle actuator is a device to control the intake of engine. If it fails, it will lead to insufficient or discontinuous air supply, resulting in intermittent engine failure. As an integral part of the engine management system, the air flowmeter mainly measures the air volume to ensure the normal operation of the engine. If the air flow meter fails, it may lead to insufficient air volume, which may lead to intermittent engine throttle.

If the spark plug is carbon-deposited or aged, it may lead to ignition failure, thus affecting the normal operation of the engine.