What causes the Buick Excelle to make a 'tututu' sound several times when starting?
2 Answers
When the Buick Excelle makes abnormal noises after starting, it is mainly caused by wear of the starter motor or loosening of the starter. Below is relevant information about the car starter: 1. Definition: The starter motor converts the electrical energy from the battery into mechanical energy, driving the engine flywheel to rotate and enabling the engine to start. Before the engine can operate under its own power, it must rely on external force to rotate. The process of the engine transitioning from a stationary state to self-sustained operation with the help of external force is called engine starting. 2. Working Principle: The starter motor is based on the physical Ampere's law, which involves the conversion of energy—specifically, the force exerted on a current-carrying conductor in a magnetic field. The motor includes essential components such as the armature, commutator, magnetic poles, brushes, bearings, and housing.
Last time I drove my Buick Excelle, I encountered the same issue—it sputtered several times before starting up. This is a classic sign of a weak battery. An aging battery or prolonged vehicle inactivity can lead to insufficient voltage, preventing the starter from turning. Another possibility is worn-out carbon brushes in the starter itself, causing slipping and producing that clicking sound. Poor fuel pump performance might also leave the engine struggling for air. Some drivers experience this in winter when low temperatures thicken the engine oil, increasing startup strain. Diagnosis is straightforward: first, test the battery—replace it if voltage drops below 12.4V; if the starter sounds sluggish, it may need disassembly for repair; don’t forget to listen for a humming fuel pump. Ignoring this could lead to stalling mid-drive—I drove straight to the shop and had it fixed in 30 minutes. A monthly short trip to recharge the battery is recommended.
