Idle Speed & Ignition Timing

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

IGNITION TIMING SPECIFICATIONS (Degrees BTDC @ RPM)

Application

⁽¹⁾ Base

⁽²⁾⁽³⁾⁽⁴⁾ Actual

1.5L

2-78@ 650-750

10 @ 600-800

1.8L

2-8 @ 600-800

5 @ 600-800

2.0L

Non-Turbo

⁽⁵⁾

Turbo

2-8 @ 650-850

8 @ 650-850

2.4L

2-8 @ 650-850

10 @ 650-850

3.0L

2-8 @ 600-800

15 @ 600-800

3.5L

2-8 @ 600-800

15 @ 600-800

⁽¹⁾	With ignition timing adjustment connector grounded or vacuum hose (farthest from distributor) disconnected.

⁽²⁾	With ignition timing adjustment connector ungrounded or vacuum hose (farthest from distributor) connected.

⁽³⁾	If vehicle altitude is more than 2300 feet above sea level, actual timing may be advanced (5 degrees).

⁽⁴⁾	Actual ignition timing is approximate and may fluctuate plus or minus 7 degrees.

⁽⁵⁾	Ignition timing is NOT adjustable.