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Home >> Mitsubishi >> 1987 >> Starion ESI-R >> Repair and Diagnosis >> Engine Performance >> System >> Throttle Opener System >> System Testing >> Air Conditioning (A/C) Load System
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Air Conditioning (A/C) Load System

  1. Engine coolant temperature should be 185-205°F (85-95°C). Disconnect Yellow-striped vacuum hose from throttle opener and connect vacuum pump to nipple. Apply vacuum and check that throttle opener rod pulls up.
  2. Apply 19.8 in. Hg of vacuum to throttle opener and check that it holds. Start engine and close Yellow-striped vacuum hose with finger to check for vacuum build-up when A/C is turned on and off.
  3. With A/C switch in "OFF" position and engine at idle, there should be no vacuum. With A/C switch in "ON" position and engine at idle, there should be vacuum. With A/C switch in "ON" position and engine at 1200 RPM or more, there should be no vacuum.
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