FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Oldsmobile
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1990
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Calais L4-151 2.5L VIN U TBI
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Repair and Diagnosis
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Specifications
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Electrical Specifications
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Ignition Timing
Ignition Timing
IGNITION TIMING
This engine uses a DIS (Direct Ignition System) to control spark timing. The timing is set at the factory and is non-adjustable.