Connect scan tool to DLC-2. Ensure idle speed and base ignition timing are set to specification. See IDLE SPEED SPECIFICATIONS and IGNITION TIMING SPECIFICATIONS (DEGREES BTDC @ RPM) tables. If adjustment is necessary, see ON-VEHICLE ADJUSTMENTS article.

IDLE SPEED SPECIFICATIONS

Application

Man. Trans. - RPM

⁽¹⁾ Auto. Trans. - RPM

B2300

800-950

B3000

760-800

880-920

B4000

760-800

760-830

Miata ⁽²⁾

750-850

Millenia

N/A

600-700

MPV ⁽²⁾

N/A

650-750

Protege & Protege5 ⁽²⁾

650-750

Tribute

2.0L

800-900

N/A

3.0L

N/A

730-750

626

2.0L

550-850

500-800

2.5L

550-750

⁽¹⁾	Place automatic transmission in Park.

⁽²⁾	Connect a jumper wire between terminals TEN and GND at DLC-1. See Figure .

IGNITION TIMING SPECIFICATIONS (DEGREES BTDC @ RPM)

Application

Man. Trans.

⁽¹⁾ Auto. Trans.

B2300

7-8 @ Idle

B3000 & B4000

11-15 @ Idle

10-12 @ Idle

Miata

6-18 @ 750-850

Millenia ⁽²⁾

2.3L

N/A

6-8 @ 600-700

2.5L

N/A

9-11 @ 600-700

MPV ⁽²⁾

N/A

4-16 @ 650-750

Protege & Protege5 ⁽²⁾

6-18 @ 650-750

Tribute

2.0L

10-20 @ 800-900

N/A

3.0L

N/A

14-15 @ 730-750

626

2.0L

6-18 @ 550-850

6-18 @ 500-800

2.5L

4-16 @ 550-750

⁽¹⁾	Place automatic transmission in Park.

⁽²⁾	Connect a jumper wire between terminals TEN and GND at DLC-1. See Figure .

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Idle Speed & Ignition Timing

Use the Manual With the Right Hardware

When to See a Mechanic

Safety Warning

Idle Speed &amp; Ignition Timing

Use the Manual With the Right Hardware

When to See a Mechanic

Idle Speed & Ignition Timing