What is the reason why the speed can't be improved when the car refuels?

The throttle sensor is faulty or the sensor is not clean. Because the accelerator pedal of our car is no longer to control the fuel injection quantity of the car, but an electric signal to control the throttle opening, when we step on the accelerator pedal, there is a problem with the fuel pump of the accelerator engine: the engine fuel pump is damaged, resulting in insufficient fuel pump delivery. Although the owner drives with floor oil, the engine speed increases, but the fuel injection of the engine is very low, and the work output of the engine is very low, which will naturally cause engine problems. Two: it's impossible to speed up, check the sensor, three: it's ok for a while, but not for a while. When I stepped on the accelerator to the bottom, the reaction was not great. Maybe the oil pump burned and the reaction was slow. In general, the clutch slips because the clutch plate is excessively worn and thinned, and the pressure plate cannot press the clutch plate. This kind of fault can only be solved by replacing the clutch plate.

If there is obvious vibration when the car is idling or driving, the engine may have the problem of insufficient combustion due to too much carbon deposition, or the lack of cylinder may lead to power reduction. Check the degree of carbon deposit in the engine, and check whether the ignition coil and spark plug are working normally. The fuel injection may be caused by insufficient oil supply from the gasoline pump, unstable oil pressure, widening spark plug gap, ignition coil failure, air leakage from the intake pipe, excessive carbon deposit in the engine, slipping friction plates of the gearbox and clutch, and unrelenting hand brake. Specifically, you can also consult the situation of slight separation when the clutch pedal of the vehicle quality network is not stepped on. No matter how high the accelerator is stepped on, the speed of the clutch in the semi-separated state cannot be increased.

For EFI diesel engines, it is necessary to check whether the speed sensor installed on the flywheel is damaged in the national III series. This thing can be found with computer detection tools. If it is a national IV engine, it is necessary to check the camshaft sensor.