1999 Acura 2.3CL StandardFACTORY OEM SERVICE PROCEDURE

Integra (A/T)

  1. Remove intake air duct from throttle body. Ensure engine coolant temperature is less than 86°F (30°C). Start engine and allow to idle. Place finger over lower port in throttle body. See Fig 1. If airflow is present at lower port in throttle body, go to next step. If airflow is not present, replace fast idle thermovalve and recheck for symptom.
  2. Start engine and run at 3000 RPM, with no loads and transmission in Park or Neutral, until radiator fan comes on. Allow engine to idle. Fast idle thermovalve should be completely closed. Place finger over lower port in throttle body. If vacuum is felt or engine idle speed decreases, fast idle thermovalve is leaking. Ensure engine coolant level is correct and cooling system is free of air. If okay, replace fast idle thermovalve and recheck for symptom.
Fig 1: Identifying Fast Idle Thermovalve Port (Integra)
G96J10065Courtesy of AMERICAN HONDA MOTOR CO., INC.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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