Why does your vehicle stall when you put it in reverse or when you go to stop?

A vehicle may stall when put in reverse or during a stop due to several reasons, including a malfunctioning idle air control valve, which can disrupt the engine's air-fuel mixture, or issues with the fuel system, such as a clogged fuel filter or weak fuel pump. Additionally, a faulty transmission can prevent the engine from properly engaging, leading to stalling. Other potential causes include vacuum leaks, worn spark plugs, or a failing battery. Regular maintenance can help identify and resolve these issues.