Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1998 Hyundai Tiburon Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Idle Speed: Notes
NOTE:
DO NOT
adjust throttle valve Speed Adjusting Screw (SAS). SAS is pre-adjusted at factory. Idle is not adjustable and is controlled by Idle Speed Control (ISC) motor.
- Ensure coolant temperature is 176-203°F (80-95°C). Turn all accessories off. DO NOT check curb idle speed while cooling fan is operating. On vehicles equipped with power steering, ensure front wheels are in straight-ahead position. Connect scan tool to DLC located at lower crash pad, below steering column. Operate engine at curb idle speed, and then operate engine for at least 5 seconds at 2000-3000 RPM.
- Run engine at idle for 2 minutes. Check idle RPM. See the IDLE SPEED SPECIFICATIONS table. If RPM is not within specification, go to next step. Ensure timing is set to specification. Check throttle body for cracks, restriction in vacuum port or passages, or binding accelerator cable. Also, check input and output value of relevant sensors. If all check out okay, see DTC P0505, P0506 or P0507 in the appropriate TESTS W/CODES
article for ISC testing. See following list.
- Accent, see: TESTS W/CODES article,
- Elantra and Tiburon, see: TESTS W/CODES article,
- Sonata 2.0L, see: TESTS W/CODES article,
- Sonata 3.0L, see: TESTS W/CODES article.
IDLE SPEED SPECIFICATIONS
| Application | RPM | |
|---|---|---|
| Accent, Elantra & Tiburon | 800 | |
| Sonata | ||
| 2.0L | 750 | |
| 3.0L | 700 | |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
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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