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Home >> Pontiac >> 1999 >> Firefly (CANADA) L4-1.3L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions - Powertrain Systems >> Engine Speed
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Engine Speed

Scan Tool Range 0-10,000 RPM. The PCM computes engine speed from the ignition reference pulses. The Engine Speed parameter should remain close to Desired Idle Speed parameter when the engine is warm and the idling.
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