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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System & Fuel System - 5.3L - Troubleshooting & Diagnosis) >> Evaporative Emission System Diagnosis >> Operating Instructions for the Evaporative Emission System Tester (EEST)

Operating Instructions for the Evaporative Emission System Tester (EEST)

WARNING: This page is about a different variant/trim than selected.

Vehicle Setup

    IMPORTANT: A large difference between the vehicle temperature and shop temperature will seriously affect the accuracy of the tests. Always allow enough time, at least 15 minutes, for the vehicle temperature to adjust to the shop temperature. Refer to Temperature Variation Instructions  for more information about vehicle versus shop temperatures.
  1. Engine OFF, open the hood. Position a large fan to blow air under the vehicle onto the fuel tank area.
  2. Connect the red battery clip from the tester to the positive battery terminal.
  3. IMPORTANT: The vehicle battery must be fully charged for optimum tester performance.
  4. Connect the black battery clip from the tester to chassis ground.