Ignition Timing: 5.0L

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Turn all accessories off. Set parking brake, and block wheels. Connect timing light to engine. Disconnect single in-line Spark Output (SPOUT) connector (Yellow/Light Green wire) near Ignition Control Module (ICM) at distributor.
Start engine and warm to normal operating temperature. Place transmission in Park (A/T) or Neutral (M/T). With engine at idle RPM, check ignition timing. See BASE IGNITION TIMING table for specification. Turn engine off. Reconnect in-line SPOUT connector. Check computed ignition timing. Computed ignition timing should be advanced beyond base timing.

BASE IGNITION TIMING

Application

Degrees BTDC @ Idle

4.6L ⁽¹⁾ & 5.0L

⁽²⁾ 10

⁽¹⁾	On 4.6L, ignition timing is not adjustable.

⁽²⁾	Disconnect single in-line SPOUT connector or remove shorting bar from double-wire SPOUT connector.