Dongfeng 153 fuel tank releases gas when the throttle is released.

In the case of large trucks, the general problem is that the air off switch is turned on. Next to the wiper, there will be no air leakage when he steps on the throttle, and there will be air leakage when he releases the throttle. However, the feeling of speeding up cannot be added up.

If there is a sound of air leakage after releasing the throttle, it is probably because there is air leakage behind the throttle of your engine.

If this happens, I suggest you find a repair shop nearby and check whether the pipeline behind your throttle is loose or leaking. Generally speaking, this situation may be that the throttle is too dirty or the pipeline behind the throttle is damaged. You can find a bigger repair shop and test it with a smoke tester.