Why does the Buick Excelle GT automatic transmission frequently stall?

[MacJonathan]

Here are the reasons why the Buick Excelle GT automatic transmission frequently stalls: Stalling caused by carbon deposits: Carbon deposits usually accumulate in the throttle body, spark plugs, cylinders, fuel lines, intake ducts, etc. They are a coking-like substance produced by fuel under high-temperature conditions. General physical methods are difficult to remove them, and special chemical cleaners are required for cleaning. Fuel quality and clogged fuel injectors: This situation is also relatively common. Using low-quality fuel not only produces more carbon deposits but may also clog the fuel injectors, resulting in poor atomization. Additionally, low-quality fuel directly affects combustion efficiency, increasing fuel consumption. The carbon monoxide formed from incomplete combustion can accumulate inside the car and may even lead to poisoning. Ignition system issues: Common faults include carbon deposits on spark plugs and insufficient ignition voltage. The former can be addressed by using a combination of physical and chemical methods to remove carbon deposits, while the latter can be resolved by replacing the spark plugs to solve the insufficient voltage problem. Power supply problems: If the battery is severely depleted, it will make the engine difficult to start or even prevent it from starting. Generally, the battery has a lifespan of about 4 years. A battery nearing the end of its life can be replaced, and repair is generally not recommended because a repaired battery has a very short service life and is less reliable.