GM 4.3 Engine Cold Start Troubleshooting

Vehicle engines come in many sizes, such as a GM 4.3.

GM vehicles have many types of engines, such as a 4.3, which is a V6. This type of engine may develop problems starting when left out in the cold. When your engine does not start in the cold, you will need to find the cause of the problem. You can troubleshoot a GM 3.4 engine by checking the condition of the spark plugs and examining the connection of the battery cables.

Things You'll Need

• Socket wrench
• New spark plugs
• Wrench
• Wire brush

Instructions

Check Spark Plugs

1. Pull the hood release in the vehicle to open the hood. Raise the hood and set the support bar.

2. Remove the spark plug wires from the spark pugs.

3. Remove the spark plugs with the socket wrench and inspect them for excessive dirt or corrosion. If the spark plugs look dirty they may become fouled and cause your vehicle not to start.

4. Replace any dirty or fouled spark plugs and see if the vehicle will now start in the cold.

Examine Battery Cables

1. Pull the hood release lever inside the vehicle to pop open the hood. Raise the hood and set the support bar.

2. Find your vehicle's battery. On most GM 4.3 engines it will be on the left side of the vehicle.

3. Examine the battery cables and see if they look corroded. Remove the battery cables with the wrench and then clean the terminals with a wire brush.

4. Re-attach the battery cables and then see if the engine will start.

Tips & Warnings

• If the battery does not hold a charge or loses its charge when in the cold, you need a new battery.

• Water in gasoline can freeze in the line and prevent the vehicle from starting.

• If you hear a clicking sound when trying to start the vehicle, the battery is dead and needs to be charged or replaced.

References

• Dummies.com: Troubleshooting a Car That Won't Start
• 2 Car Pros: How Do I Change My Spark Plugs?
• Second Chance Garage: How to Clean Battery Terminals

Resources

• 2 Car Pros: Rapid Clicking Sound When Engine is Cranked