How does idle speed work on a Honda Civic?
This system automatically controls engine idle speed to a specified level. Idle speed is controlled through fine adjustment of the amount of air which by-passes the throttle valve via Idle Air Control Valve (IACV) and Auxiliary Air Control AAC) Valve.
How does the idle air control valve work?
The IACV-AAC valve changes the opening of the air by-pass passage to control the amount of auxiliary air. This valve is actuated by a step motor built into the valve, which moves the valve in the axial direction in steps corresponding to the Engine Control Module ( ECM) output signals.
How can I tell if my Honda Civic has a vacuum leak?
The easy way to find out if there is a vacuum leak is to spray the hoses with starter fluid or brake cleaner. Make sure this is done on a cool engine. If any of the hoses are cracked or not sealed correctly, they’ll suck in the vapor and the car’s idle will change. This should help you find the general location of a leak.
Why does my Honda Civic LX not accelerate?
Broke the throttle body on my Accord. The bottom coolant pass through. I have bypassed the coolant part but the car wont accelerate and dies if you give even part throttle. Do I need to replace the en…
This system automatically controls engine idle speed to a specified level. Idle speed is controlled through fine adjustment of the amount of air which by-passes the throttle valve via Idle Air Control Valve (IACV) and Auxiliary Air Control AAC) Valve.
The easy way to find out if there is a vacuum leak is to spray the hoses with starter fluid or brake cleaner. Make sure this is done on a cool engine. If any of the hoses are cracked or not sealed correctly, they’ll suck in the vapor and the car’s idle will change. This should help you find the general location of a leak.
The IACV-AAC valve changes the opening of the air by-pass passage to control the amount of auxiliary air. This valve is actuated by a step motor built into the valve, which moves the valve in the axial direction in steps corresponding to the Engine Control Module ( ECM) output signals.