Idle Speed & Ignition Timing

WARNING: This page is about a different variant/trim than selected.

Ensure idle speed and ignition timing are set to specification. See IDLE SPEED SPECIFICATIONS and IGNITION TIMING . For adjustment procedures, see ADJUSTMENTS - 2.3L 4-CYL article.

IDLE SPEED SPECIFICATIONS

Application

RPM

Prelude

⁽¹⁾ 500-600

⁽²⁾ 650-750

⁽³⁾ 720-820

⁽¹⁾	With Idle Air Control (IAC) valve disconnected, headlights and cooling fan off, and transmission in Neutral or Park.

⁽²⁾	With Idle Air Control (IAC) valve connected, headlights and cooling fan off, and transmission in Neutral or Park.

⁽³⁾	With headlights on low or heater fan on HI and A/C on.

IGNITION TIMING (Degrees BTDC @ RPM)

Application	Specification
Prelude	13-17 @ 650-750