Idle Speed & Ignition Timing

Ensure idle speed and ignition timing are set to specification. See IDLE SPEED SPECIFICATIONS and IGNITION TIMING tables. 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

B16A2 Engine ⁽¹⁾

All

⁽²⁾ 400-500

All

⁽³⁾ 650-750

All

⁽⁴⁾ 700-800

All

⁽⁵⁾ 760-860

D16Y7 Engine ⁽¹⁾

A/T

⁽⁶⁾ 650-750

A/T

⁽⁵⁾ 760-860

M/T

⁽⁶⁾ 620-720

M/T

⁽⁵⁾ 760-860

D16Y8 Engine ⁽¹⁾

A/T

⁽⁶⁾ 650-750

A/T

⁽⁵⁾ 760-860

M/T

⁽²⁾ 400-500

M/T

⁽³⁾ 620-720

M/T

⁽⁴⁾ 700-800

M/T

⁽⁵⁾ 760-860

⁽¹⁾	USA and 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⁾

Turn ignition off and reset PCM by removing BACK UP (7.5-amp) fuse, located in underhood fuse/relay box for 10 seconds. With Idle Air Control (IAC) valve 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 and ensure headlights are off.

⁽⁴⁾	Check after one minute with headlights on low.

⁽⁵⁾	Turn headlights off and check after one minute with blower motor on HIGH and A/C on.

⁽⁶⁾	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 and ensure headlights are off.

IDLE CO LEVEL

Application	CO Level
Civic Del Sol	0.1%

FAST IDLE SPEED SPECIFICATIONS

Application	RPM
Civic Del Sol	N/A

IGNITION TIMING - Degrees BTDC - RED MARK @ RPM

Application

Specification

B16A2 Engine ⁽¹⁾

14-18 @ 650-750

B16A2 Engine ⁽²⁾

14-18 @ 700-800

D16Y7 Engine

A/T

10-14 @ 650-750

M/T

10-14 @ 620-720

D16Y8 Engine

A/T ⁽¹⁾

10-14 @ 650-750

A/T ⁽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.