1. Locate the ICM: The ICM's location varies slightly depending on the specific year and options. On most 1983 Z28s with Crossfire Injection, the ICM is typically located on the passenger side of the engine compartment, usually mounted to the inner fender or firewall. It's a small, rectangular box with several connectors. Consult a factory service manual or a wiring diagram specific to your vehicle to confirm its precise location.
2. Disconnect the Connectors: Carefully unplug all connectors from the ICM. Take note of their orientation before disconnecting them to ensure correct reinstallation. It's helpful to take photos as well. Some connectors may have locking tabs that need to be depressed before pulling.
3. Remove Mounting Bolts (if applicable): The ICM might be secured with one or two bolts. Remove these carefully, using the correct size socket or wrench.
4. Remove the Old ICM: Once the connectors are disconnected and the mounting bolts are removed (if any), carefully remove the old ICM from its mounting location.
5. Install the New ICM: Before installing the new ICM, visually inspect it for any damage. Carefully align the new ICM with its mounting location and install it. If it has mounting bolts, secure it firmly.
6. Reconnect the Connectors: Carefully plug in all the connectors to the new ICM, ensuring they are securely seated and match the orientation of the old connectors. Refer to your photos or diagrams if necessary.
7. Reconnect the Battery: Reconnect the negative battery cable.
8. Test the Ignition System: Start the engine and listen for smooth operation. Check for any misfires or unusual noises. A test drive is highly recommended to fully verify the repair.
Important Considerations:
* Factory Service Manual: A factory service manual for your specific 1983 Camaro Z28 is invaluable for this repair. It will provide precise location diagrams, connector details, torque specifications, and troubleshooting information.
* Crossfire Injection Complexity: Crossfire injection systems can be more complex than other systems. If you're uncomfortable working with this type of fuel injection, it's advisable to seek professional help. A misdiagnosis or incorrect installation could damage other components.
* Parts Quality: Ensure you are purchasing a high-quality replacement ICM from a reputable supplier. A faulty ICM will lead to repeat problems.
* Safety: Remember to always disconnect the negative battery cable before starting any work on the ignition system to prevent electrical shocks and accidental short circuits.
This guide provides a general overview. The specifics might differ slightly depending on your vehicle's configuration. Always consult a service manual for detailed instructions specific to your 1983 Camaro Z28. If you're not comfortable performing this repair yourself, it's best to take your car to a qualified mechanic.
