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Idle Speed & Ignition Timing

Ensure idle speed and base ignition timing are set to specification. Refer to appropriate IDLE SPEED SPECIFICATIONS  and IGNITION TIMING SPECIFICATIONS  tables. If necessary, see appropriate articles;

For B2300 ADJUSTMENTS

For B3000 ADJUSTMENTS

For B4000 ADJUSTMENTS

IDLE SPEED SPECIFICATIONS

Application M/T (1) A/T
B2300 (2) 475-575 475-575
B3000 (2) (2)
B4000 750 825
(1) Place automatic transmission in Park.
(2) Idle speed is preset and is not adjustable. Use New Generation Star Tester (49-T088-0A0) connected to data link connector to verify idle speed.
IGNITION TIMING SPECIFICATIONS(Degrees BTDC @ RPM)

Application M/T (1) A/T
B2300, B3000 & B4000 (2) (2)
(1) Place automatic transmission in Park.
(2) Base (initial) timing is preset at 8-12 degrees BTDC and is not adjustable.