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Home >> Cadillac >> 1999 >> Seville STS V8-4.6L VIN 9 >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data, Normal Values and Definitions >> Scan Tool Data Definitions - Powertrain Systems >> Fuel Tank Vapor Press. Slope
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Fuel Tank Vapor Press. Slope

The display shows pressure slope from 0 to 2 in inches of H2O per second. The vapor pressure slope is used during the PCM's diagnosis of the EVAP system. The PCM uses pressure slope to determine the amount of vapor pressure being released from the fuel.
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