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Ignition Timing: Prelude

Set parking brake. Start engine and ensure idle speed is correct. See IDLE SPEED & MIXTURE . Turn ignition off. Connect SCS Service Connector (07PAZ-0010100) to 2-pin service check connector (Green/Black wire and Red/White wire) located on right side of center console, behind access cover, next to 16-pin Data Link Connector (DLC). See Fig 7. Connect tachometer. Run engine at 3000 RPM with no electrical loads (headlights, blower motor, rear defogger, A/C and cooling fan off) and transmission in Park or Neutral. When radiator cooling fan comes on, allow engine to idle.
Connect timing light to No. 1 spark plug wire. Check base ignition timing with no electrical loads. See IGNITION TIMING (DEGREES BTDC - RED MARK @ RPM) table.
Timing marks are located on flywheel/drive plate. Remove rubber plug from window in flywheel/drive plate housing located under distributor. See Fig 13. Timing is controlled by Powertrain Control Module (PCM). If timing is not as specified, replace PCM. See REMOVAL, OVERHAUL & INSTALLATION article. Remove SCS service connector from 2-pin service check connector.

IGNITION TIMING (DEGREES BTDC - RED MARK @ RPM)⁽¹⁾

Application

Specification

Accord

2.3L

⁽²⁾ 10-14 @ 650-750

3.0L

⁽²⁾ 8-12 @ 630-730

Civic

⁽²⁾ 6-10 @ 650-750

CR-V

⁽³⁾ 14-18 @ 700-800

Insight

⁽²⁾ 10-14 @ 850-950

Odyssey

⁽²⁾ 8-12 @ 680-780

Prelude

⁽³⁾ 13-17 @ 650-750

S2000

⁽²⁾ 3-7 @ 750-850

⁽¹⁾	Check in no-load condition (headlights, blower motor, rear defogger, A/C and cooling fan off) with M/T in neutral or A/T in Neutral or Park.

⁽²⁾	With scan tool connected to 16-pin Data Link Connector (DLC). See Fig 1-Fig 5 .

⁽³⁾	With SCS service connector (7PAZ-0010100) connected to 2-pin service check connector located under passenger side instrument panel.

Fig 1: Locating Data Link Connector (Accord)

G99C08686

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Locating Data Link Connector (Odyssey)

G99H08684

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 3: Locating Data Link Connector (S2000)

G00012230

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Locating Data Link Connector (Civic)

G00033749

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 5: Locating Data Link Connector (Insight)

G00033750

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 6: Locating Service Check Connector (CR-V)

G95D31255

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 7: Locating Service Check Connector (Prelude)

G99A08685

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 8: Locating Ignition Timing Marks (Accord 2.3L)

G94J44163

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 9: Locating Ignition Timing Marks (Accord 3.0L & Odyssey)

G00012229

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 10: Locating Ignition Timing Marks (Civic)

G00033743

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 11: Locating Ignition Timing Marks (CR-V)

G00033744

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 12: Locating Ignition Timing Marks (Insight)

G00033746

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 13: Locating Ignition Timing Marks (Prelude)

G96J09585

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 14: Locating Ignition Timing Marks (S2000)

G00012226

Courtesy of AMERICAN HONDA MOTOR CO., INC.