Why does an automatic transmission car keep stalling when starting?

[DeSkylar]

Theoretically, automatic transmission vehicles should not experience stalling. If stalling occurs, it is necessary to first determine whether it is a fault-induced stall or a resistance-induced stall. A resistance-induced stall happens when the car's current power is less than the external resistance it faces, making it insufficient to move the car forward, thus causing the engine to stall. A fault-induced stall can be caused by issues in the fuel system, intake system, or ignition system—any problem in one of these three systems can lead to stalling. Common causes of fault-induced stalling include: 1. Problems with the ignition coil; 2. Issues with the spark plugs, such as reaching the end of their lifespan; 3. Problems with the throttle position sensor; 4. Use of low-quality gasoline, leading to clogged fuel injectors. The specific cause of stalling needs to be diagnosed at a 4S shop or a professional repair shop.

[DelBrody]

I've been experiencing frequent stalling when starting my automatic transmission car recently. As a novice driver, I initially thought it was due to improper operation, but later figured out some possible causes. It might be an issue with the torque converter in the transmission - the torque converter controls power delivery, and if it's worn out, it can cause shaking or even stalling during startup. Another common culprit is a dirty engine throttle body. The throttle body acts like a valve for air intake, and excessive carbon buildup can block airflow, making it difficult to maintain idle speed. There's also the possibility of aging ignition system components, like spark plugs that have been used for several years, causing unstable ignition. Last time I went to the shop, a simple throttle body cleaning solved the problem at minimal cost. Remember not to procrastinate - timely inspections and maintenance can prevent roadside breakdowns and accidents. Safe driving is the bottom line, and as a beginner, it's always good to keep learning and asking questions.

[DelEmerson]

Stalling when starting an automatic transmission car is a serious issue that requires careful analysis. I've encountered many similar cases where the problem could be a dirty or faulty transmission valve body, affecting power transfer. On the engine side, accumulated dust on the mass airflow sensor can mislead the ECU's intake data, causing the air-fuel mixture to be too rich or lean. A stuck idle control valve can also lead to unstable idling and stalling during startup. Fuel system problems are common too - insufficient fuel pump pressure or a clogged filter can starve the engine of fuel. I recommend checking simple fixes first, like replacing spark plugs or cleaning the throttle body. If that doesn't work, use a diagnostic tool to read trouble codes for more professional handling. Don't attempt DIY repairs - take it to a qualified repair shop, as ensuring driving safety is paramount.

[DelSpencer]

Having driven automatic transmission cars for decades, I often encounter stalling issues during startup. Mostly, it's due to poor fuel flow, worn fuel pumps, or clogged filters, leading to insufficient pressure, which causes the engine to stall at idle. Alternatively, carbon buildup in the idle control valve can cause it to stick. Another possibility is aging ignition wires leaking electricity. Last year, my car had this issue, and replacing the spark plugs plus cleaning the throttle body fixed it. Reminder: regularly change the air filter and avoid off-brand gasoline. Small problems can lead to major hazards—timely maintenance ensures safety.

[DelGenesis]

As a female driver who uses an automatic transmission daily, I've been quite worried about frequently stalling when starting recently. After checking, it might be due to severe carbon buildup in the throttle body, which needs timely cleaning; or insufficient fuel supply caused by a clogged fuel filter affecting fuel delivery. Sensor issues, such as a faulty oxygen sensor, could also lead to an imbalance in the air-fuel mixture. Last time I sent it for repair, the mechanic mentioned a problem with the idle control system. Everyone, don't be careless when driving. Regularly check the seal of the fuel tank cap, maintain simple components, and address issues promptly. Safety on the road is the most important.