Why does an automatic transmission car not move at idle and requires acceleration to move?

1 Answers
GenevieveFitz
07/30/25 5:13am
If an automatic transmission car does not move at idle without pressing the accelerator, there are two possible reasons: first, the throttle may be too dirty—check and clean the throttle (the throttle signal is the main control signal for the transmission); second, check if the transmission is too dirty, causing increased transmission resistance. Additional information: 1. Check the throttle: The car's throttle plays a crucial role. If the throttle is clogged, the vehicle's power will be affected. It is the key component that allows air to enter the engine, enabling gasoline and air to mix and burn efficiently. The cleanliness of the throttle directly determines the accuracy and smoothness of engine air intake. A dirty throttle can cause engine idle shaking, stalling, frequent jerking while driving, and significantly increased fuel consumption. Most importantly, it can damage the engine or even cause it to stop working. 2. Clean the throttle: There are two methods for cleaning the throttle—removal cleaning and non-removal cleaning. Removal cleaning involves taking it off and using a specialized cleaning agent, which is effective but more costly. Non-removal cleaning involves spraying a dedicated foam cleaner on the throttle, reducing disassembly time and avoiding damage to the vehicle.
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