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Mercury
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1998
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Grand Marquis V8-281 4.6L SFI
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Ignition Timing
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Adjustments
Ignition Timing: Adjustments
Base
ignition timing
is referenced to the position of the Crankshaft Position sensor (
CKP
sensor) and is set at
10 ± 2 degrees
Before Top Dead Center
(BTDC).
The timing is not adjustable.