3000GT VR-4 AWD V6-2972cc 3.0L DOHC MFI Twin Turbo (1998)
Idle Speed: Testing and Inspection
Idle Speed Inspection
(1) The vehicle should be prepared as follows before the inspection.
- Engine coolant temperature: 80 - 95° C (176 - 203° F)
- Lights, electric cooling fan and accessories: OFF
- Transaxle: neutral
(2) Connect a tachometer.
(3) Set a timing light.
(4) Using a jumper wire, ground the ignition timing adjusting terminal.
(5) Start the engine and let it idle.
(6) Check the ignition timing is the standard value; if not, adjust.
Standard value: 5° BTDC ± 3°
NOTE: Check the ignition timing with the scan tool not connected to the data link connector.
(7) Remove the jumper wire from the ignition timing adjusting terminal.
(8) When using the scan tool, turn OFF the ignition switch and connect the tester to the data link connector.
(9) Idle the engine for two minutes.
(10) Check the curb idle speed.
Standard value: 700 ± 100 r/min
NOTE:
(1) The idling speed is automatically regulated by the idle-speed control system.
(2) In the case of a DOHC engine, the engine speed indicated is a third of actual speed. In other words, the reading of the tachometer times 3 is
actual speed.
(11) If there is a deviation from the standard value.
