If you’re a car enthusiast, the AEM FIC (Fuel Ignition Controller) is a powerful tool that can help you optimize the performance of your vehicle. But before you can use it, you need to understand how to wire it properly. In this article, we’ll provide a comprehensive AEM FIC wiring diagram and answer some frequently asked questions about the process. Let’s get started!
What is the AEM FIC?
The AEM FIC is a device that allows you to control the fuel and ignition system on your car. It can be used to improve engine performance, adjust fuel and ignition timing, and even add features like launch control and antilag. The AEM FIC is compatible with a wide range of vehicles and can be used in both naturally aspirated and forced induction applications.
One of the key advantages of the AEM FIC is that it allows you to make precise adjustments to the fuel and ignition system that would be difficult or impossible to achieve with the stock ECU. This can result in significant gains in horsepower and torque, as well as improved drivability and fuel economy.
How to Wire the AEM FIC
Before you start wiring the AEM FIC, it’s important to make sure you have all the necessary components. Here’s a list of what you’ll need:
| Component | Quantity |
|---|---|
| AEM FIC unit | 1 |
| AEM FIC harness | 1 |
| Wires and connectors | As needed |
| Wire strippers and crimpers | 1 each |
Once you have all the components, you can begin wiring the AEM FIC. Here’s a step-by-step guide:
Step 1: Locate the ECU
The first step is to locate the stock ECU (Engine Control Unit) on your vehicle. This will vary depending on the make and model of your car. In most cases, the ECU is located under the dashboard or in the engine bay.
Step 2: Identify the Wires
The next step is to identify the wires that need to be connected to the AEM FIC. This will also vary depending on your car, but the AEM FIC instructions will provide a wiring diagram specific to your vehicle. Here are some common wires that may need to be connected:
- Ignition switch signal
- Engine coolant temperature sensor
- Intake air temperature sensor
- Throttle position sensor
- MAP sensor
- Injectors
- Coils
Step 3: Connect the Wires
Once you’ve identified the wires, you can begin connecting them to the AEM FIC harness. Use the wire strippers to remove a small section of insulation from each wire, then crimp on the appropriate connector and plug it into the AEM FIC harness. Be sure to double-check each connection to make sure it’s secure.
Step 4: Mount the AEM FIC Unit
The final step is to mount the AEM FIC unit in a location that’s easily accessible but won’t be exposed to excessive heat or moisture. A common location is under the dashboard or in the glove box.
AEM FIC Wiring Diagram
Here’s a sample AEM FIC wiring diagram for a 2004 Subaru Impreza WRX STI:
AEM FIC FAQ
What is the difference between the AEM FIC and the AEM EMS?
The AEM FIC is a fuel and ignition controller that works in conjunction with the stock ECU, while the AEM EMS (Engine Management System) replaces the stock ECU entirely. The AEM EMS offers more advanced features and greater control over the engine, but it also requires more extensive wiring and tuning. The AEM FIC is a good option for those who want to improve performance without completely replacing the stock ECU.
Do I need to tune the AEM FIC?
Yes, you will need to tune the AEM FIC in order to get the best performance from your engine. This can be done using a dyno or a wideband O2 sensor. The AEM FIC instructions provide guidance on how to tune the device for your specific application.
Can the AEM FIC be used with forced induction?
Yes, the AEM FIC can be used with forced induction applications such as turbochargers and superchargers. In fact, it can be particularly effective in these applications because it allows you to make precise adjustments to the fuel and ignition system that are necessary for optimal performance.
Is the AEM FIC legal for street use?
The legality of the AEM FIC for street use will depend on the emissions regulations in your area. In general, any modification to the emissions system of a vehicle is likely to be subject to scrutiny by regulatory agencies. It’s important to check the local regulations before installing the AEM FIC.
What kind of performance gains can I expect with the AEM FIC?
The performance gains you can expect with the AEM FIC will depend on a variety of factors, including the make and model of your car, the modifications you’ve made to it, and how the device is tuned. In general, you can expect to see gains in horsepower and torque, as well as improved throttle response and drivability.
Can I install the AEM FIC myself?
Yes, the AEM FIC can be installed by a competent DIYer with experience in automotive wiring. However, it’s important to follow the instructions carefully and double-check all connections to ensure that everything is wired correctly. If you’re not confident in your abilities, it’s best to have a professional install the device for you.
Conclusion
The AEM FIC is a powerful tool that can help you optimize the performance of your vehicle. By understanding how to wire it properly, you can take advantage of its many features and see significant gains in horsepower and torque. If you’re considering installing the AEM FIC on your car, be sure to follow the instructions carefully and tune it properly for optimal performance.
