Toyota Supra JZA80

Idle speed

  1. Initial conditions
    1. Engine at normal operating temperature
    2. Air cleaner installed
    3. All pipes and hoses of air induction system connected
    4. All accessories switched OFF
    5. All vacuum lines properly connected
      All vacuum hoses for EGR system, etc. should be properly connected.
    6. SFI system wiring connectors fully plugged
    7. Ignition timing checked correctly
    8. Transmission in neutral position
  2. Connect Toyota hand-held tester or OBDII scan tool
  3. Inspect idle speed

    1. Race the engine speed at 2,500 rpm for approx. 90 seconds.
    2. Check the idle speed.
      Idle speed: 650 ± 50 rpm
      If the idle speed is not as specified, check the IAC valve.
  4. Disconnect Toyota hand-held tester or OBDII scan tool
This guide is based on the book edition Toyota (RM502U, 1997)