What Causes a Car to Fail to Start in the Rain?
2 Answers
The reason a car fails to start after rain is due to the engine spark plugs getting wet. Below are specific details about why the car won't start after rain: Solution: Remove the spark plugs, disconnect the fuel injector plug, start the engine to drain any water in the cylinders, replace the engine oil, then reinstall the spark plugs and fuel injector plug, and start the engine. It's important to note that when the car fails to start on a rainy day, do not attempt to start it repeatedly, as this can easily damage the valves. Preventive measures: Check if the spark plugs are leaking electricity, inspect whether the spark plug caps are cracked or loose, examine if the connection between the filter and carburetor is broken, check if the valves are too tight, verify if the ignition system is functioning properly, and avoid driving the car into areas with deep water during rainy days to prevent water from entering the engine.
I've encountered the situation where a car won't start in rainy weather several times, usually caused by moisture seeping into the ignition system. For example, when spark plugs get damp they can't generate sparks, or when ignition coils short-circuit causing abnormal current flow, preventing the engine from starting. Rusty or corroded battery terminals becoming wet in rain often lead to poor contact - another common issue. Additionally, aged or cracked wire insulation allows rainwater intrusion causing short circuits; water entering the air filter affects the air-fuel mixture, resulting in sluggish response during ignition. I remember one time when I went on an outing and got caught in heavy rain - the car wouldn't start after being parked overnight, and it took me hours to discover the distributor cap had a hole letting water in. Since then, I always check these components before rainy seasons, keeping them dry and applying waterproof spray when necessary. Preventing these issues can save considerable trouble and time.
