Replace the throttle valve of the gasoline pump.

1. Considering that you said that the gasoline pump has just been changed and the steam filter has also been changed, the first step is to measure the oil pressure, and about 2.5 kg should be normal.

2. Considering that you cleaned the throttle valve, did you move the vacuum tube when disassembling the bellows, pulled out the plug of the airflow, and put all these away after washing.

3. Connect the diagnostic instrument to see if there is a fault code. The water temperature sensor plug is not good, which will affect the start.

4. Check whether there is fire in each cylinder. If there is fire, check whether the spark plugs are all good, whether there is too much carbon deposit, breakdown and excessive wear. By the way, you can check whether the engine cylinder pressure is normal. Generally, it is normal to weigh more than 7 kg.

5. Check whether the nozzle is atomized well. If it's not good, take it down and charge for washing.