Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
ECI System
The Electronic Control Injection (ECI) system is a computerized emission and fuel control system. The ECI system controls engine operation and lowers exhaust emissions while maintaining good fuel economy and driveability. The Electronic Control Unit (ECU) is the foundation of the ECI system. The ECU monitors many of the related systems to constantly adjust air/fuel ratio. Air/fuel ratio control is achieved by controlling driving time of the 2 injectors installed on injection mixer. The ECI System consists of the following subsystems: Air/Fuel Ratio Control, Ignition Timing Control, Idle Speed Control (ISC), Secondary Air Control and EGR Control.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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