Why Car Won’t Start In Rain?

Monsoon is one of the seasons to beat the summers. But it becoming challenging to the motorist if water clogged on road due to not proper drainage system or if there is heavy rain in a whole day. If you drive and the car won’t start in rain, you have to struggle a lot. So, we prefer the drivers to take another alternative way during these seasons but sometimes it becomes complicated for them that we understand very well.

Before you head out on the rainy days and get stuck. Read whole articles, so that you can know what will happen in the rain and if stuck, what prevention should you take.

Why Car Won’t Start In Rain?

A car that won’t start in the rain can have several issues but the main reasons are

1. Spark Plug

Wire insulation can become thin and this causes the voltage to arc to the metal of the car engine rather than going into the spark plug. You can check it visually by opening the hoods when it’s wet outside and trying the car to start. You can see the arc from the spark plug wire. This is the main reason why cars won’t start in rain.

2. Distributor Cap

The distributor cap looks like the crown that has a black cable connect to the spokes on its top. It’s located under the car’s hood. It is the cover that protects the internal parts and holds the contact between the internal rotor and spark plug wires. If you find any crack on the distributor cap, just open the distributor cap and check inside. If you find any moisturizer just wipe it as in wet condition it will not start. This is also the reason why the car won’t start in rain.

3. Electrical System

Rubber fitment at door, windshield and automotive is not fit, water leak into the car and form a huge problem of the car.

4. Body Coating

When the automobile industry makes cars they usually coat the car anti-rust under the body or sometimes they paint with anti-rust properties. But sometimes due to their fault, we have to suffer in heavy rains, under the body of the car get direct contact with rainwater and the rust will become a big issue in old cars mainly.

5. Battery Cells And Terminals

Sometimes battery cells and terminals become corrosion due to heavy rain. Basically what happens current does not pass to the engine from the corrosion battery and form the generator to the battery to charge the battery. It can be the reason why cars won’t start in rain.

6. Wires

The wires are exposed to the danger in the old cars if it does not change in time. Sometimes due to this reason, a short circuit can occur in the car and that’s why cars don’t work in the heavy rain.

What To Do If Car Won’t Start After Driving In Rain?

If you end up with your car stuck in rain. Here is something you have to do

1. Hydrostatic Lock

The very common mistake every car owner or driver can make by trying to start the engine. If your vehicle is stuck on rainy days, never start the engine. This is because when you start the engine stalled in water, the water will enter into the engine and can lead to hydrostatic lock. In this situation, the water enters into the engine cylinder and destroys the piston, sparks plugs, and valves. Repairing this whole part will costly affair.

2. Stay Calm

It is easy to panic in this situation. Even if you are a normal cool person. However without getting panic just call 911 helpline no.

3. Turn On Your Lights And Unlock The Door

It is necessary to turn on both headlights. So that one can easily spot you from far. And always keep unlocking the door. So that you can easily come out.

4. Be Sure Car Is Insured

No one except that their car will end up in the river. So always keep up-to-date insurance.

What Prevention Should You Take?

Driving on the road during rainy days can be challenging. Here are some precaution to make sure you drive as safely as possible humanly

1. Avoid Passing Through Standing Water

Many of them make this common mistake that they drive on standing water but they do not know how much the level of water is? and when water can enter the cabin? This can make lots of damage.

2. Keep You Car In First Gear And The Reverse High

If you do not find an alternative route and you have to go in standing water, keep your car in first gear and keep high reverse. The benefit of this will be to keep the car steady at low speed and have a strong grip on the car and at high reverse which helps in preventing water inside the car.

3. Drive On Higher Part Of The Road

Try to drive on the higher part of the road because it’s nothing but just prevent entering the water in the car and you will not be stuck on the rainy days.

4. Starting Your Car Back

If your car stand in the middle of the road, either turn the car back as fast as possible or don’t do anything. You have to do it quickly because if you need to crank up the engine before the water tries to seep in. If you get late and water level crosses the exhaust pipe, in that case starting the car will lead to worst things and it raises to hydrostatic lock.


If there is a waterlogged street and the water level is just below the tire, without taking stress just drive over it. If the water level crosses the wheel hub center, we recommended that you avoid taking that route. Whenever you get stuck in rain prevent starting the engine and call for help. Take the car to the mechanics as soon as possible to prevent unnecessary damage.

This monsoon takes all the necessary steps mention here to prevent unwanted damages to your car and guarantee your personal safety.

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