Operation CHARM
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Pontiac
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1989
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Firebird V6-231 3.8L
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Repair and Diagnosis
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Powertrain Management
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Tune-up and Engine Performance Checks
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Ignition Timing
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Specifications
Ignition Timing: Specifications
IGNITION TIMING
These engines use DIS (Direct Ignition System) systems, and Timing is non-adjustable.
THROTTLE POSITION SENSOR
Voltage
.40 +/- .05 volts