What is the reason for an Audi stalling and restarting without cause?

[DeMargaret]

Specific reasons are introduced as follows: 1. The spark plug loses its ignition capability. 2. Throttle failure. 3. Carbon deposits: Carbon deposits can cause incomplete combustion of gasoline, leading to engine shaking issues. Additional information: 1. The specific effects of engine carbon deposits on a car are as follows: (1) Reduced engine power, meaning uneven and gradually decreasing power output, in other words, the car becomes less powerful over time. (2) Increased fuel consumption, adding to the economic burden. (3) Difficulty in cold starts, meaning the car is hard to start. (4) Severe carbon deposits in the combustion chamber can also cause cylinder knocking, noise during low-speed acceleration, damage to the piston and crankshaft, and high engine temperatures, severely affecting car safety. (5) Exceeding emission standards, not only failing annual inspections but also directly increasing environmental pollution hazards.