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Home >> Honda >> 1989 >> Prelude Si, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Basic Testing - CARBURETED >> Idle Speed & Ignition Timing

Idle Speed & Ignition Timing

Ensure idle speed and ignition timing are set to specification. For adjustment procedures, see ADJUSTMENTS article.

IDLE SPEED SPECIFICATIONS

Application RPM
Low Altitude 700-800
High Altitude
Man. Trans. 750-850
Auto. Trans. 700-800
Fast Idle
Low Altitude 1000-2000
High Altitude 1100-1900
(1) Idle speed is set with headlights and cooling fan off and automatic transmission in Drive.
IGNITION TIMING

Application Setting
Carbureted
Auto. Trans. (1)
California 8-12 @ 700-750
Federal 13-17 @ 700-750
Man. Trans.
California 13-17 @ 700-750
Federal 18-22 @ 750-850
(1) Auto. trans. in Drive.