Base Idle Speed

CAUTION: Improperly adjusted throttle valve opening will increase exhaust gas temperature at deceleration, reducing catalyst life greatly and deteriorating exhaust gas cleaning performance. It also affects fuel consumption and engine braking.

NOTE: Adjustment of idle speed is usually not required. If idle speed is out of specification check and verify the operation of the idle speed control system. Refer to COMPUTERIZED ENGINE CONTROLS.

1. Precondition the vehicle as follows:
a. Engine coolant temperature greater than 176 degrees F.
b. Lights, electric cooling fan, and all electrical accessories off.
c. Transaxle in neutral or park.
d. Steering wheel in the neutral position.
e. Ignition timing verified correct.
f. Loosen accelerator cable.





2. Insert special tool 09273-24000 and hyundai multi-use tester (or equivalent).

Data Transmission Terminal:

NOTE: If the special tool 09273-24000 and multi use tester are not used, connect a tachometer and ground the data transmission terminal of the diagnostic connector.

Connecting Jumper To Terminal:

3. Connect lead wire and ground the ignition timing terminal
4. Run the engine at 2,000 to 3,000 rpm for 5 to 10 seconds.
5. Allow the engine to idle for 2 minutes.
7. Verify Idle Speed.

Curb Idle Speed
750 +/- 50 rpm.

Idle Speed Adjusting Screw:

8. If idle speed is not as specified, adjust the idle speed control adjusting screw.
9. Stop the engine.
10. Disconnect diagnostic terminal ground wire.
11. Disconnect ignition timing connector ground wire.
12. Disconnect the battery ground cable for at least 15 seconds.
13. Start engine and let it idle for about 10 minutes, verify idle is normal.