you cant without having a remap.
its controlled electonically by the ecu via the Idle air control valve on the throttle body.
generally only vehicles fitted with carburetor can adjust idle speed manually.
The 2008 Honda Civic has a 5-speed manual.
With the governor on it you can hit 123mph
The 2008 Honda Civic has 16 valves.
The 2008 Honda Civic is a gas-powered vehicle.
The 2008 Honda Civic has an inline 4 engine.
The towing capacity for the 2008 Honda Civic is 1500 lbs. The 2008 Civic Hybrid is 1000 lbs.
The height of the 2008 Honda Civic is 4 ft. 5.5 in. (53.5 in.).
The curb weight of the 2008 Honda Civic is 2586 lbs..
The 2008 Honda Civic runs on regular unleaded.
The 2008 Honda Civic has single overhead cam (SOHC).
The 2008 Honda Civic is 14 ft. 6.8 in. (174.8 in.) long.
The 2008 Honda Civic's turning circle is 35.4 ft.