how to start car with bad starter

[LeJayce]

The most reliable way to start a car with a bad starter is to bypass the faulty solenoid using a remote starter switch or, as a temporary emergency measure, by gently tapping the starter motor with a tool like a wrench or a tire iron. If the starter motor's internal components are just stuck, this can free them up enough to get one more start. However, these are short-term fixes to get you to a repair shop, not permanent solutions.

A starter motor is an electric motor that cranks the engine to begin the combustion process. When you turn the key, a small electrical signal is sent to the starter solenoid, which acts as a heavy-duty relay. The solenoid then engages a gear (the pinion) with the engine's flywheel and connects the starter motor to the car's battery, allowing it to spin the engine.

Here are the most common methods, from simplest to most technical:

• Tapping the Starter: Locate the starter motor (usually cylinder-shaped, near where the engine and transmission meet). Have a helper turn the ignition key to the "start" position while you gently tap the starter's body. The impact can jostle the stuck electrical contacts or a jammed gear inside the motor. Do not hammer it violently, as this can cause further damage.

• Bypassing the Solenoid: This directly applies battery power to the starter. You'll need a wrench or a screwdriver with an insulated handle.

  1. Locate the starter solenoid, which is often mounted directly on the starter motor. It will have two large terminals: one connected to the battery and the other to the starter motor.
  2. Ensure the car is in Park (automatic) or Neutral (manual) with the parking brake firmly engaged.
  3. Very carefully, use the tool to bridge a connection between these two large terminals. This will create a large spark and bypass the ignition switch, causing the starter to crank immediately if the motor itself is functional.

• Push-Starting (Manual Transmission Only): This method uses the car's own momentum to turn the engine over, bypassing the starter entirely. It will not work on automatic transmission vehicles.

  1. Turn the ignition to the "on" position.
  2. Press the clutch pedal in and put the car in second gear.
  3. Have the car pushed or roll it down a hill until you reach about 5-10 mph.
  4. Quickly release the clutch pedal. The turning wheels will force the engine to rotate, and it should start. Immediately push the clutch back in.

Method	Works On	Key Action	Success Likelihood	Primary Risk
Tapping Starter	All Vehicles	Physically jostle internal components	Low to Moderate	Damaging starter or surrounding parts
Bypass Solenoid	All Vehicles	Apply power directly to starter motor	Moderate to High	Electrical short, sparks, personal injury
Push-Start	Manual Transmission Only	Use vehicle momentum to turn engine	High if battery has charge	Damage to automatic transmission, loss of control

Remember, these are diagnostic or emergency tricks. A failing starter is a sign of a component at the end of its life and should be replaced by a professional mechanic.

[VonAdriel]

If you're stuck in a parking lot, the first thing to try is the tap trick. Pop the hood, find the starter—it's a little cylindrical thing bolted to the engine where it meets the transmission. Have a friend try to start the car while you give the starter a couple of solid but careful whacks with something like a tire iron. If it's just a stuck brush, that might be enough to get it going so you can drive straight to the shop. Don't keep trying it over and over, though.

[VonOscar]

From a mechanical standpoint, a "bad starter" often means a failed solenoid, which is the switch that sends power to the motor. You can bypass it. With the ignition off, use an insulated screwdriver to carefully connect the two large posts on the solenoid. This sends power directly from the battery to the starter motor. It will spark, so be prepared. If the engine cranks, you've confirmed the solenoid is the issue. This is a diagnostic step that can also get you moving again, but extreme caution is required to avoid short circuits.