Changhe Freda o9 uphill can't add the throttle, that is, the starting throttle can't be added.

Hello! If the acceleration is not good, it is natural to consider the combustion situation. The main reasons here are as follows. First, the fuel pressure is too low, resulting in insufficient oil supply and insufficient power. I suggest you clean the injector and check the oil pressure at the same time. Second, poor ignition leads to poor combustion and obvious waste oil. I suggest you replace the spark plug. Third, the cylinder pressure is insufficient, which is a common manifestation of cylinder trembling and also a lack of power. This needs testing.