Idle Speed & Ignition Timing

Ensure idle speed and ignition timing are set to specification. See IDLE SPEED SPECIFICATIONS and IGNITION TIMING . For adjustment procedures, see the ADJUSTMENTS article. Before checking or adjusting idle, ensure MIL has not been reported on, timing is correct, and that spark plugs, air cleaner and PCV system are okay.

IDLE SPEED SPECIFICATIONS

Application

RPM

D16Y5 M/T & D16Y8 M/T Engines

⁽¹⁾ 400-500

⁽²⁾⁽⁵⁾ 620-720

⁽²⁾ 700-800

⁽³⁾ 700-800

⁽⁴⁾ 760-860

D16Y5 CVT & D16Y8 A/T Engines

⁽²⁾⁽⁵⁾ 650-750

⁽²⁾ 700-800

⁽⁴⁾ 760-860

D16Y7 Engine

A/T

⁽²⁾⁽⁵⁾ 650-750

⁽²⁾ 700-800

⁽⁴⁾ 760-860

M/T

⁽²⁾ 620-720

⁽²⁾ 700-800

⁽⁴⁾ 760-860

⁽¹⁾	Canadian models.

⁽²⁾	With Idle Air Control (IAC) valve disconnected, transmission in Neutral or Park and no load (headlights, blower motor, rear defogger, A/C and cooling fan off). On Canadian models, set parking brake and ensure headlights are off.

⁽³⁾	Check after one minute with headlights on low.

⁽⁴⁾	Turn headlights off and check after one minute with blower motor on HIGH and A/C on.

⁽⁵⁾	Check with Idle Air Control (IAC) valve and Intake Air Temperature (IAT) sensor connected, transmission in Neutral or Park and no load (headlights, blower motor, rear defogger, A/C and cooling fan off). On Canadian models, set parking brake. Ensure headlights are off.

IDLE CO LEVEL

Application	CO Level
Civic	0.1%

FAST IDLE SPEED SPECIFICATIONS

Application	RPM
Civic	N/A

IGNITION TIMING - Degrees BTDC - RED MARK @ RPM

Application

Specification

A/T & CVT ⁽¹⁾

10-14 @ 650-750

A/T & CVT ⁽²⁾

10-14 @ 700-800

M/T ⁽¹⁾

10-14 @ 620-720

M/T ⁽²⁾

10-14 @ 700-800

⁽¹⁾	USA vehicles.

⁽²⁾	Canadian vehicles.