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.
Idle Speed
- Apply parking brake.
- Warm up the engine to normal operating temperature.
- Turn OFF all electrical loads.
- Connect inductive tachometer to number one (1) spark plug wire or connect tachometer pickup lead to terminal `O' in the data link connector (DLC). In case of using scan tool connect Hi-scan pro to the DLC.NOTE: The base idle speed is not adjustable. The idle speed is automatically controlled by the engine control module. Incorrect idle speed indicates a potential problem with the IAC system or an intake manifold leak.
- Check that idle speed is within specified range.
Idle speed (transaxle in "NEUTRAL"): 750 +/- 50 RPM
NOTE: This is a "wasted spark" ignition system, some tachometers will indicate twice the actual engine speed. - Disconnect tachometer from DLC or spark plug wire.
- Turn off engine.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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