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 System Description
The main components of the air intake system are air cleaner (1), air cleaner outlet hose (2), throttle body (3) (for details, refer to DESCRIPTION OF ELECTRIC THROTTLE CONTROL SYSTEM:J24B .), IMT valve (4) which adjusts the distributor pipe length of intake manifold to (A) or (B) (for details, refer to IMT (INTAKE MANIFOLD TUNING) SYSTEM DESCRIPTION:J24B .), intake manifold (5) and IMRC valve (6) (for details, refer to IMRC (INTAKE MANIFOLD RUNNER CONTROL) SYSTEM DESCRIPTION:J24B ).
The air (by the amount corresponding to throttle valve (7) opening and engine speed) is filtered by the air cleaner, distributed by the intake manifold, and finally drawn into each combustion chamber. Throttle body is not equipped with IAC valve for idle speed control. Idle speed control is done by the throttle actuator (8) which opens and closes the throttle valve. (For details, refer to DESCRIPTION OF ELECTRIC THROTTLE CONTROL SYSTEM:J24B .)
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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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