The accelerator is suddenly hard to step on. What happened?

Some car owners say that the throttle of their car suddenly becomes too difficult to step on, which is generally divided into two situations. One is that once you step on the accelerator, the car can't lift its speed. The other is that you may find that the accelerator of the car can't step on it, just like a stone stuck under the accelerator. You have to step on it hard, but then the car will suddenly rush forward. Why is this? The accelerator pedal in winter is harder than in other seasons, because the temperature in winter is low and the water in the accelerator line freezes, which makes the accelerator pedal harder. This situation can be solved by turning on the warm air in the car. After a period of use, the throttle line needs to be replaced. If the throttle itself is found to be astringent or stagnant, don't open it again. Check whether the throttle cable has a bent dead angle. You can lubricate the cable with some oil, and then check whether the linkage outside the throttle is stuck. Engine carbon deposition Generally speaking, the biggest reason for the hard accelerator pedal is the carbon deposition on the engine and accelerator. When the car is cold, because of carbon deposition, the accelerator line can't be pulled up smoothly after stepping on the accelerator, so it will feel very hard, and it will be too hard if you push it a little. If this happens, you need to go to the 4S shop or repair shop for inspection and maintenance, and clean the nozzle, throttle and other places.