What Causes a Car to Stall While Driving?
2 Answers
Common main reasons for car stalling: First, insufficient driving skills or improper operation can also cause a car to stall. Second, fuel pump failure. A stuck fuel pump or a malfunctioning fuel pump can suddenly stop supplying fuel, leading to stalling. Third, the use of substandard fuel. More details are as follows: 1. Automatic transmission cars generally do not stall easily. If an automatic transmission car stalls, the main reason is usually the use of substandard (below-standard) fuel, which leads to engine carbon buildup and stalling. It could also be due to spark plug or ignition coil failure, causing one or more cylinders to misfire, resulting in stalling. However, stalling only occurs when multiple cylinders fail to ignite simultaneously, so this is possible but not highly likely. 2. Troubleshooting methods for stalling: 1. The main solution is to improve driving skills through rapid practice; 2. Use high-quality, standard-compliant fuel; 3. Thoroughly clean the fuel system, including the fuel injectors, throttle body, fuel tank, etc.; 4. The main cause of stalling during idle is excessive dust in the air, leading to deposits on the idle valve and throttle body. When too much dirt accumulates, the engine's idle speed becomes too low and unstable, causing stalling during driving. The solution is simple: just clean the engine.
I've been driving for over 20 years and have encountered sudden engine stalling several times. The most common issue is fuel pump problems, such as aging pump cores or clogged fuel lines, leading to insufficient fuel supply and engine shutdown. Ignition system failures are also frequent, like severely carbon-fouled spark plugs or faulty ignition coils causing misfires. Electrical issues often occur too, such as poor battery contact or alternator failure cutting power. Mechanical factors are another cause, like broken timing belts or engine overheating protection activating. When stalling occurs, immediately steady the steering wheel, coast to a safe spot, turn on hazard lights, and check fuel gauge or warning lights. If it happens again after restarting, don't risk driving to the shop - it's a safety issue. Regular maintenance like checking spark plugs and fuel lines every 5,000 km can effectively prevent this.
