···
Log in / Register

What to Do If the Car Won't Start the Day After Driving Through Water?

3 Answers
McArthur
07/29/25 1:51pm
If your car didn't stall after driving through water but won't start normally the next day, it's recommended to take it to a professional repair shop for inspection. Here are possible causes: 1. Battery Discharge: A weak battery directly leads to difficulty starting or failure to start. Common issues include poor contact at the battery terminals or problems with the battery management system. 2. Ignition System: After ruling out battery issues, the next step is to check the car's 'ignition system,' which is crucial for starting. Faulty ignition coils or spark plugs can also prevent the car from starting.
Was this review help?
17
3
Share
DelKennedy
08/13/25 5:15am
Seeing the car fail to start the day after driving through water reminded me of my last lesson. I guessed water had entered critical parts, like the spark plugs getting wet and short-circuiting or the air filter getting clogged. Don’t rush to repeatedly start the engine, as this could worsen the damage. I checked myself: popped the hood and sure enough, the air filter was soaked—I quickly took it out to dry. Then, I wiped any water around the spark plugs with a towel and waited half an hour for it to air-dry before trying again, but it still wouldn’t start. Later, I noticed water stains on the battery terminals, but even after cleaning them, there was no response, so I wisely called a tow truck. After repairs, I learned the fuel pump had taken in water—that was the root cause. The key is to stay calm; after driving through water, don’t rush to start the car—letting it air-dry naturally is best.
Was this review help?
17
3
Share
Expand All
LeMarley
10/10/25 5:41am
As a new driver, I panicked when encountering this situation. The car wouldn't start the day after driving through deep water. My first instinct was to check the battery—looking for loose or corroded terminals, which seemed fine. Then I opened the air filter box and found it slightly damp, but cleaning it didn't help. I had to ask a friend for advice, who suggested stopping any further attempts to start the engine immediately and calling for roadside assistance instead. The tow truck took the car to a repair shop, where the technician diagnosed a short circuit in the ignition system due to water ingress. Now I've learned that after driving through water, it's crucial not to act rashly. After checking simple components, it's best to seek professional help to avoid causing more damage. After the repair, it was recommended to install a waterproof kit to prevent similar issues in the future.
Was this review help?
14
5
Share
Expand All
More Forum Discussions

Which car models are equipped with HUD heads-up display?

There are many car models equipped with HUD heads-up display, such as BMW 3 Series, BMW 5 Series, Toyota Levin, and some models under Mazda also feature heads-up display. The HUD heads-up display system can show vehicle speed and navigation information. With a heads-up display, drivers don't need to shift their gaze when checking certain information. Taking the BMW 3 Series as an example, it is a sedan product of BMW Group with a body weight of 1465 kg, powered by an inline 4-cylinder gasoline engine. In terms of body dimensions, it measures 4734mm in length, 1811mm in width, and 1455mm in height, with a wheelbase of 2920mm.
11
5
Share

Is Fully Synthetic Engine Oil Suitable for All Cars?

Fully synthetic engine oil is not suitable for all cars. For some micro, small, and compact cars, it is unnecessary to use fully synthetic oil throughout, as excessively high viscosity will only increase fuel consumption. Older vehicles are also advised against using fully synthetic oil, as it may not only be wasteful but could also potentially cause damage to the engine. Engine oil, also known as motor lubricant, serves to lubricate and reduce friction in the engine, assist in cooling, seal against leaks, prevent rust and corrosion, and act as a shock absorber. Engine oil consists of base oil and additives. The base oil is the main component of the lubricant, determining its fundamental properties, while the additives compensate for and improve any shortcomings in the performance of the base oil.
16
2
Share

Where to Inflate When Tire Pressure is Insufficient?

Tire pressure can be replenished at auto repair shops or 4S dealerships when insufficient. Alternatively, a bicycle pump can also be used for inflation. It is advisable to purchase a portable electric car air pump (ensure it comes with a tire pressure monitoring function) to keep in your vehicle for convenient tire inflation anytime needed. Tire pressure monitoring systems are primarily categorized into two types: indirect tire pressure monitoring and direct tire pressure monitoring. Tire pressure refers to the air pressure inside the tires. In automotive maintenance, the engine is considered the heart of the car—its failure marks the end of the vehicle's lifespan—while tire pressure serves as the car's blood pressure. The level of tire pressure plays a crucial role in the vehicle's performance and power.
16
5
Share

Can different grades of engine oil be mixed?

Different grades of engine oil should not be mixed, as mixing may alter the viscosity of the oil and adversely affect engine lubrication. Engine oils are specifically classified into 4 types for summer use, 6 types for winter use, and 16 types for all-season use. Summer oils are graded as 20, 30, 40, and 50, with higher numbers indicating greater viscosity and suitability for higher maximum temperatures. Winter oils are graded as 0W, 5W, 10W, 15W, 20W, and 25W, where 'W' stands for Winter. The smaller the number before 'W', the lower the low-temperature viscosity, the better the low-temperature fluidity, and the lower the minimum applicable temperature.
16
5
Share

What is the basic working principle of a car braking system?

Car braking system working principle: The automotive braking system is divided into two types, one is hydraulic braking, and the other is pneumatic braking. Hydraulic braking uses the master cylinder to transmit brake fluid as the medium through the brake lines to each brake slave cylinder. Pneumatic braking uses high-pressure gas as the braking medium, which is then delivered through pipelines to each brake slave cylinder. Although the working principles of these two braking methods are different, the braking effects they achieve are the same, both capable of applying braking force to the car. The braking system is a very important part of a car, enabling the vehicle to decelerate or stop according to the driver's commands during operation.
4
2
Share

What is the difference between a one-way street and a straight lane?

The differences between a one-way street and a straight lane: 1. Different placement of signs: A one-way street is marked by a sign, usually at the entrance of the road, indicating the entire road; a straight lane is marked by road surface markings, usually at the exit of the road, indicating a single lane. 2. Different sign shapes: A one-way street has a square sign; a straight lane has a circular sign. 3. Different forms of signs: The one-way sign is usually located on the right side of the road, displayed on a vertical board; the straight sign is usually located on the ground. At intersections with lane dividers, the road in the forward direction is called a straight lane, and the lane marked with a straight arrow on the ground at a fork in the road is a straight lane.
2
0
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.