What is the reason for the engine cutting out while driving and then resuming after pressing the accelerator again?
2 Answers
The reason for the engine cutting out while driving and then resuming after pressing the accelerator again: It could be due to a malfunction in the throttle pedal position sensor or throttle position sensor. Issues with the idle control valve or engine control unit (ECU) can also cause this phenomenon. It is recommended to contact a 4S dealership for inspection and repair. Basic working principle of engine fuel cut-off protection: For small and medium-sized diesel engines, the fuel cut-off protection usually involves installing a small cylinder on the throttle linkage. The piston of this small cylinder is connected to the throttle linkage. Under normal circumstances, the small piston rod does not interfere with the throttle linkage's adjustment of the throttle. When the diesel engine experiences a loss of lubricating oil pressure, the pressure detection device installed in the lubricating oil pipeline will open the compressed air switch, allowing compressed air to reach the small cylinder through the pipeline, pushing the piston to move. This causes the throttle linkage to move to the extreme position in the fuel cut-off direction, completely cutting off the fuel supply, resulting in the engine stopping due to fuel cut-off.
Oh, I've encountered this situation a few times while driving too. Everything seems fine, then suddenly the power cuts out, as if it's stuck, and it returns to normal after pressing the accelerator again. This is usually due to minor issues in the fuel system or electronic sensors. The most common cause is a clogged fuel filter; excessive carbon buildup can restrict fuel flow, and when you pause and press the accelerator again, it barely works. Alternatively, it could be an aging fuel pump motor that operates unstably, failing to supply fuel at certain RPMs, leading to this intermittent issue. Another possibility is poor contact in the throttle position sensor, where dust accumulation causes signal loss, and the issue resolves once the sensor reconnects. I recommend first checking the air filter and fuel filter to see if they're too dirty—give them a simple clean. If the problem occurs frequently, take your car to a 4S shop for a comprehensive diagnosis immediately. Don’t delay, as sudden engine failure on the highway can be dangerous. Remember, regular maintenance can prevent such issues.
