The reason why Dongfeng Nissan Qi Jun gas valve can't be upshifted.

Qi Jun fuel valve does not upshift because the oil pressure in the main oil circuit is too low, and the throttle valve or manual valve body fails. It is necessary to check the speed sensor, wiring harness and related circuits, and pay special attention to whether the circuit interface is in poor contact. Check the mechanical failure of solenoid valve and gearbox.

Don't step on the automatic gearbox all the way, because shifting gears takes time and can be completed in one second. But the signal to the engine is that it needs to accelerate, not climb a hill. Step on it first, release it and then step on it. Tell the engine to speed up, even if the second gear is changed to the third gear. At this time, if you keep stepping on the accelerator, the engine will think that it is accelerating rapidly, such as overtaking.

Reasons for not being able to upshift after refueling:

1. Failure of gasoline pump and blockage of fuel filter will also lead to engine power reduction.

There is something wrong with the engine. The power source is the combustion of fuel, and the engine is responsible for providing fuel and converting chemical energy into mechanical energy.

2. The clutch slips. Clutch slip is mainly manifested when the car accelerates, especially when going uphill, the driving wheel can't run.

3. Engine oil system. If the engine oil is insufficient for a long time and the optical power is insufficient, the fuel consumption will increase; The heavy piston hits its door, causing mechanical damage to the relevant connector.

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