How to replace the ignition coil on a 1969 Pontiac GTO Judge?

When your 1969 Pontiac GTO Judge begins to experience issues such as rough idling, stalling, or misfires, one potential culprit could be a failing ignition coil. The ignition coil is responsible for converting the battery's voltage to the higher voltage needed to create a spark in the spark plugs. If it goes bad, your engine will not run properly. Here is how to solve this issue and replace the ignition coil on your classic car.

Step 1: Prepare Your Workspace

First, make sure your car is parked on a flat surface and the engine is cool. Disconnect the negative battery terminal to prevent any electrical accidents. The negative terminal is typically marked with a minus ("-") sign and is connected via a black cable.

Step 2: Locate the Ignition Coil

In the 1969 Pontiac GTO Judge, the ignition coil is found in the engine compartment, typically toward the rear of the engine bay on the passenger side. It is a cylindrical component attached to the distributor with a cable. Visually, it may be 3 inches long, metallic, and mounted vertically or horizontally.

Step 3: Remove the Old Ignition Coil

Unplug the high-tension lead (the thick cable coming out from the top) from the ignition coil. You may need to press a release tab or gently twist while pulling. Afterward, disconnect the smaller power and ground wires attached to the coil's terminals, remembering the configuration for reassembly.

Remove the bolts or screws fastening the ignition coil to its mounting bracket using a wrench or screwdriver. Carefully pull the coil from its position.

Step 4: Install the New Ignition Coil

Place the new ignition coil in the same orientation and location as the old one. Secure it using the same bolts or screws you previously removed. Reattach the smaller power and ground wires to their respective terminals on the coil, ensuring each connection is tight and secure.

Step 5: Reconnect the High-Tension Lead

Plug the high-tension lead back into the top of the new ignition coil. Ensure it fits snugly and clicks into place if there is a retention feature.

Step 6: Reconnect the Battery and Test

Reconnect the negative battery terminal to restore electrical power. Start the engine to ensure the new ignition coil is working correctly. If the engine runs smoothly without stalling or misfires, your replacement was successful.

By following these steps, you should be able to replace the ignition coil on your 1969 Pontiac GTO Judge and restore its proper operation.