Dead BatteryĪ dead battery is one of the common reasons why a car won’t start. Let’s look at some common scenarios you might encounter and the possible reasons why they’re happening. If any of these components are missing or occur at the wrong time or amount, your vehicle simply won’t start. When the air/fuel mixture ignites, the burning gasses in the cylinders expand, driving the pistons and transferring the energy from combustion into mechanical energy that moves the car. Compression - The cylinders in your engine compress the air/fuel mixture before it ignites.This air/fuel mixture is then ignited by a spark from the ignition system. Fuel is injected into the combustion chamber and combined with air. Fuel - The fuel system (gasoline, filters, pumps, injectors, lines, etc.) is another key element for starting a car.Spark - The ignition system (spark plugs, wires, coils, ignition module, Engine Control Module (ECM)) must deliver a spark strong enough to ignite the air/fuel mixture (and at the correct time), creating combustion that makes your engine generate power.There’s a three-ingredient recipe every engine needs to run properly: Potential Reasons Why Your Car Won’t Start There are several possible answers to that question, so let’s go over some of the most common reasons why your car may not start. As the frustration mounts, you inevitably think to yourself: Why the heck won’t my car start? It’s frustrating and inconvenient, but it happens. Nearly every driver has experienced this scenario - you get in your car, turn the key in the ignition, and…nothing.
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