13 arrizo 7, what is the reason why you can't open the throttle when you start?

According to the above description, the throttle opening will not be too large when starting. When accelerating, the throttle opening will also increase as the accelerator pedal is depressed. If the throttle opening is unchanged, it proves that the throttle is faulty and needs to be replaced. If the opening is normal, it is necessary to further check other reasons for the lack of acceleration, mainly from the intake system, oil supply system, ignition system, exhaust system, timing mechanism and so on.