how to start car that has been sitting

3 min read 16-01-2025

A car that's been sitting unused for a while can present some challenges when you try to start it. Don't worry, though! With a little preparation and know-how, you can get your vehicle running again. This guide will walk you through the process, covering everything from preliminary checks to troubleshooting common issues. Getting your car started after a long period of inactivity is easier than you might think.

Before You Turn the Key: Essential Pre-Start Checks

Before even attempting to start your car, it's crucial to perform several checks to prevent further damage and ensure a smooth process. These simple steps can save you time and potential headaches later.

1. Inspect the Battery

Check the terminals: Look for corrosion on the battery terminals. Clean them with a wire brush and baking soda solution if necessary. Corrosion can severely impede the flow of electricity.
Test the battery: Use a multimeter or battery tester to check the voltage. A healthy battery should read around 12.6 volts. If it's significantly lower, you'll likely need a jump start or a new battery. Low voltage is a common reason a car won't start after sitting.
Check the cables: Make sure the battery cables are securely connected to both the battery and the car's electrical system. Loose connections can prevent the engine from turning over.

2. Examine the Fluids

Engine oil: Check the oil level using the dipstick. Low oil levels can lead to engine damage if you try to start the car. Add oil if needed, ensuring you use the correct type and grade specified in your owner's manual.
Coolant: Inspect the coolant level in the radiator. Low coolant can cause overheating. Top it off with the appropriate coolant mixture if necessary. Never open a hot radiator!
Brake fluid: Check the brake fluid reservoir. Low brake fluid could indicate a leak, which is a serious safety concern. You'll need to address this before driving.
Power steering fluid (if applicable): Check the fluid level for your power steering system if your car has it. Low fluid will affect steering.
Transmission fluid (automatic transmissions): Check the transmission fluid level, using the dipstick. Low levels can damage the transmission. Consult your owner's manual for instructions specific to your vehicle.

3. Fuel Check

Fuel level: Ensure you have enough fuel in the tank. A low fuel level can cause starting problems.
Fuel system: If the car has been sitting for an extended period, old fuel may have accumulated water or sediment. This can clog fuel injectors and prevent the engine from running. Consider adding a fuel system cleaner to your tank before attempting to start the car.

Jump Starting Your Car (If Necessary)

If your battery is dead, you'll need a jump start. This is a common issue for cars that have been sitting for a long time.

Gather your materials: You'll need jumper cables and another car with a working battery.
Connect the cables: Follow the proper procedure for connecting jumper cables. Connect the positive (+) cable to the positive terminal of both batteries first. Then, connect the negative (-) cable to the negative terminal of the working battery and the negative terminal of the dead battery last.
Start the cars: Start the car with the working battery first. Then, attempt to start your car.
Disconnect the cables: Once your car starts, disconnect the cables in the reverse order you connected them.

Troubleshooting Starting Issues

Even after these checks, you might still encounter problems starting your car. Here are some common issues and solutions:

1. The Engine Cranks But Doesn't Start

Dead battery: Even if you tried a jump start, the battery might be too weak. A replacement might be needed.
Fuel pump issues: The fuel pump may have failed or become weak due to age. It might require attention from a mechanic.
Spark plug issues: Old spark plugs could be fouled or damaged. A mechanic can diagnose and replace them if necessary.
Ignition system problems: Issues with the ignition coil, distributor, or other components can prevent the engine from firing.

2. The Engine Doesn't Crank at All

Dead battery: This is the most likely cause. Jump start or replace the battery.
Faulty starter motor: The starter motor might have seized or failed due to age or lack of use. A mechanic can repair or replace it.
Loose or corroded battery cables: Clean and tighten any corroded or loose connections.

3. The Engine Starts But Runs Rough

Old fuel: Old fuel can cause rough running. Consider adding a fuel injector cleaner to your tank.
Dirty air filter: A clogged air filter restricts airflow and can cause rough running. Replace it with a new one.

When to Call a Mechanic

If you've tried these steps and still can't start your car, it's best to call a qualified mechanic. They have the tools and expertise to diagnose and fix more complex problems.

Remember to always prioritize safety. If you're unsure about any step, consult your owner's manual or seek professional help. Getting your car running again after it's been sitting can be a rewarding experience, but safety should always come first.