Does the throttle have a strainer? If there is sand in the intake pipe, will it be directly sucked into the engine when starting the car, and will the throttle be blocked?

This is really not! Intake air filtration mainly depends on air filter. If there is sand or other impurities in the pipeline, it will directly enter the engine cylinder, leading to cylinder pulling! Therefore, it is particularly important to replace the air filter regularly, and other impurities must be cleaned up in time, so as to keep the engine in good working condition!