What Causes a Manual Transmission Car to Stall When Braking?
2 Answers
The reasons why a manual transmission car stalls when braking are as follows: 1. Use of low-quality fuel; 2. Carbon deposits in the engine; 3. Circuit failure or sensor malfunction; 4. Damaged fuel pump, cracked fuel line, or clogged carburetor inlet; 5. Faulty throttle position sensor, air flow sensor, intake pressure sensor, crankshaft position sensor, or camshaft position sensor; 6. Disordered engine timing system. A manual transmission car uses a manual shift mechanical transmission to regulate speed, meaning that shifting the gear lever changes the gear meshing position inside the transmission, altering the gear ratio to achieve speed variation. The clutch must be depressed to move the gear lever.
I've been driving manual transmission cars for several years and have encountered situations where the engine stalls when braking, mainly due to not pressing the clutch pedal in time. When braking causes a sudden drop in speed, the engine RPM decreases too rapidly. If the clutch isn't depressed to disconnect the power, the car is prone to stalling. Another reason could be an idle speed set too low or a clogged air filter, making the engine run unstable. I recommend practicing the synchronized operation of the clutch and brake, such as lightly pressing the clutch before braking when decelerating. Regularly check the vehicle's idle speed and maintain it around 800 RPM to prevent stalling. For safety, if the car stalls on the road, immediately turn on the hazard lights and pull over to check, avoiding the risk of a rear-end collision. From experience, more practice can help avoid such embarrassing situations.
