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Idle Speed & Ignition Timing

Ensure idle speed and ignition timing are set to specification. For idle speed adjustment procedures, see ADJUSTMENTS article. Ignition timing is not adjustable.

IDLE SPEED & CO LEVEL

Application Idle RPM (1) CO Level
240, 740 & 940
Non-Turbo 775 0.6%
Turbo 750 0.6%
960 750 0.6%
(1) O2 sensor disconnected. CO level is measured before catalytic converter.
IGNITION TIMING (Degrees BTDC @ RPM)

Application (1) Timing
240, 740 & 940 12 @ 725-825
960 5 @ 750
(1) Ignition timing is computer-controlled and is not adjustable.