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Idle Speed & Ignition Timing

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

CAUTION: DO NOT  ground DLC terminal IG-. Damage to ignitor and/or ignition coil may result. Ensure tachometer is compatible with this system before use.
IDLE SPEED SPECIFICATIONS

Application Idle RPM
SC300 With Auto. Trans. 600-700
All Others 650-750
IGNITION TIMING SPECIFICATIONS

Application (1) Base Timing (2) Controlled Timing
ES300 10 @ 650-750 10-20 @ 650-750
GS300 10 @ 650-750 8-12 @ 650-750
LS400 8-12 @ 650-750 (3)*
SC300
Auto. Trans. 10 @ 600-700 9-11 @ 600-700
Man. Trans. 10 @ 650-750 9-11 @ 650-750
SC400 8-12 @ 650-750 (3)*
(1) Jumper wire connected between terminals TE1 and E1 of DLC.
(2) Jumper wire disconnected from DLC.
(3) Information is not available from manufacturer.
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