Push starting a car, also known as bump starting or roll starting, is a method of starting a car with a dead battery by using momentum instead of the starter motor. While common in older vehicles, there are misconceptions about its effectiveness in modern manual cars. This article clarifies the process and addresses common questions about push starting a manual transmission vehicle.
Understanding the Mechanics of Push Starting
Push starting relies on the basic principles of engine operation. A running engine requires fuel, air, and a spark. The starter motor normally initiates engine rotation, allowing these elements to combine and ignite. When the battery is dead, the starter won’t function. Push starting bypasses the starter by using the car’s movement to turn the engine over. With the car in gear and the clutch engaged, the wheels’ rotation transfers to the engine crankshaft when the clutch is released. This simulates the action of the starter motor, potentially starting the engine.
Step-by-Step Guide to Push Starting a Manual Car
Here’s a detailed guide on how to push start a manual car:
- Find a Slope (Optional): A slight downhill slope can make the process easier, requiring less pushing effort. A flat surface will also work, but more effort will be needed.
- Get Help: Enlist the help of two or more people to push the car.
- Turn the Ignition to the “On” Position: This powers the essential electrical systems necessary for ignition. Don’t attempt to crank the engine with the starter.
- Put the Car in Second Gear: Second gear offers a good balance between speed and torque for starting. Avoid first gear as it can cause jerky movements and potential stalling.
- Depress the Clutch: Fully depress the clutch pedal to disengage the engine from the transmission.
- Start Pushing: Have your helpers push the car until it reaches a jogging pace (around 5-10 mph).
- Release the Clutch: Once the car is moving, quickly release the clutch pedal. This engages the engine with the transmission, forcing it to turn over. You might need to give the gas pedal a slight tap.
- Listen for the Engine: If the engine starts, immediately depress the clutch and apply gentle pressure to the gas pedal to keep it running.
- If it Doesn’t Start: If the engine doesn’t start on the first attempt, repeat steps 5-8. If repeated attempts fail, there might be a problem beyond a dead battery.
Important Considerations for Modern Cars
While push starting is a viable option for many manual cars, modern vehicles often have complex electronic systems that rely on a functioning battery. Fuel pumps, engine management computers, and security systems may require a minimum voltage to operate. If these systems don’t have sufficient power, push starting might not be successful. Always consult your owner’s manual as it may advise against push starting for specific models. In some cases, attempting to push start a modern car can cause damage to the catalytic converter or other components.
Alternatives to Push Starting
If push starting isn’t successful or recommended for your vehicle, consider these alternatives:
- Jump Starting: Using jumper cables to connect your dead battery to a functioning battery from another vehicle is a safer and more reliable method.
- Battery Charger: A portable battery charger can provide enough power to start your car.
- Professional Assistance: Calling a roadside assistance service or a tow truck is the safest option if you’re unsure how to proceed.
