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.
Air Intake Control System: Description
The air intake control system supplies air for all engine needs. The system consists of the air cleaner, air intake pipe, throttle body, Electronic Idle Control Valve (EICV), throttle angle sensor, fast idle mechanism and intake manifold.
On Legend Coupe with 2.7L engine, a by-pass control system is incorporated into the intake system. Two air paths are provided in the intake manifold to allow selection of the intake path length to vary for different engine operations. A long path is used for high torque at low RPM. A shorter path is used for high power at high RPM.
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.