Why Won't My Car Start on Rainy Days?

[McAmara]

There are several reasons why a car may fail to start on rainy days: 1. Electrical circuit failure: Since most vehicle wiring and pipelines are concentrated in the engine compartment, driving through water can easily cause splashing onto internal wiring and pipelines. Over time, this may lead to short circuits in the wiring or blocked fuel lines, resulting in the most direct symptom - the car won't start. 2. Battery issues: In low temperatures, the increased viscosity of the electrolyte reduces its permeability, while increased resistance lowers the output power. This makes it difficult for the starter to crank the engine to the minimum starting speed, affecting engine ignition.