If you’re a car enthusiast or a mechanic, you’ve probably heard of the AEM EMS 4. It’s a powerful engine management system that allows you to tune your car for optimum performance. However, installing the AEM EMS 4 can be a bit tricky, especially if you’re new to wiring. In this article, we’ll take a closer look at the AEM EMS 4 wiring diagram and how to install it in your car.
What is the AEM EMS 4?
The AEM EMS 4 is a standalone engine management system that can be used to control fuel and ignition in your car. It’s designed for use with aftermarket performance parts and allows you to fine-tune your engine for maximum power output. The EMS 4 features four programmable inputs and outputs, making it highly customizable and versatile.
What are the key features of the AEM EMS 4?
The AEM EMS 4 features several key benefits that make it a popular choice among car enthusiasts. These include:
| Feature | Description |
|---|---|
| Standalone system | The EMS 4 does not require a factory ECU to operate, making it highly customizable. |
| 4 programmable inputs and outputs | This allows for fine-tuning of fuel and ignition settings. |
| USB connectivity | Allows for easy calibration and data logging. |
| Wideband O2 sensor compatible | Allows for highly accurate tuning. |
Understanding the AEM EMS 4 Wiring Diagram
Before you can install the AEM EMS 4 in your car, you’ll need to understand the wiring diagram. The wiring diagram shows the various connections that need to be made between the EMS 4 and your car’s sensors and actuators. Here’s a breakdown of the wiring diagram:
Power and Ground Connections
The AEM EMS 4 requires both power and ground connections to operate. The power connection should be connected to a switched 12V source, while the ground should be connected to a chassis ground point. These connections are typically made using a ring terminal and a bolt.
Ignition Inputs
The AEM EMS 4 requires two ignition inputs – one for the primary ignition signal and one for the secondary ignition signal. These connections are made to the respective wires on your car’s ignition coil. Make sure to check your car’s service manual for the correct wire colors.
Fuel Injector Outputs
The AEM EMS 4 features four fuel injector outputs, which are used to control the fuel injectors in your car. These connections are typically made to the wires on the fuel injector harness. Make sure to check your car’s service manual for the correct wire colors.
Throttle Position Sensor
The throttle position sensor (TPS) is used to monitor the position of the throttle plate in your car’s throttle body. The AEM EMS 4 requires a connection to the TPS sensor wire (typically a green/white wire).
Intake Air Temperature Sensor
The intake air temperature (IAT) sensor is used to monitor the temperature of the air entering the engine. The AEM EMS 4 requires a connection to the IAT sensor wire (typically a yellow wire).
FAQs
What is the difference between the AEM EMS 4 and the AEM Infinity?
The AEM EMS 4 is an entry-level engine management system designed for use with basic engine setups. The AEM Infinity, on the other hand, is a high-end engine management system that is designed for use with advanced engine setups. The Infinity offers greater tuning precision and more advanced features.
Can the AEM EMS 4 be used with turbocharged engines?
Yes, the AEM EMS 4 can be used with turbocharged engines. However, it’s important to have your engine properly tuned to ensure safe and reliable operation.
Do I need to be an expert in wiring to install the AEM EMS 4?
No, you don’t need to be an expert in wiring to install the AEM EMS 4. However, it’s recommended that you have basic knowledge of wiring and electrical systems to ensure a safe and reliable installation.
Is the AEM EMS 4 compatible with my car?
The AEM EMS 4 is compatible with most cars. However, it’s important to check the compatibility of your specific car before purchasing the EMS 4. Check the AEM website or contact their customer support for more information.
How do I program the AEM EMS 4?
The AEM EMS 4 can be programmed using the AEM Tuner software. The software allows you to make adjustments to fuel and ignition settings, as well as other engine parameters. Check the AEM website for more information on using the AEM Tuner software.
Overall, the AEM EMS 4 is a powerful and versatile engine management system that can help you get the most out of your car’s performance. With a little knowledge of wiring and electrical systems, you can install the EMS 4 in your car and start fine-tuning your engine for maximum power output.
