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 & Ignition Timing
Ensure idle speed and base ignition timing are set to specification. See IDLE SPEED SPECIFICATIONS and IGNITION TIMING SPECIFICATIONS (Degrees BTDC @ RPM) tables. If adjustment is necessary, see ON-VEHICLE ADJUSTMENTS article.
| Application | Man. Trans. RPM | (1) Auto. Trans. RPM | |||||
|---|---|---|---|---|---|---|---|
| Miata | 750-850 | 750-850 | |||||
| Millenia | N/A | 600-700 | |||||
| MPV | N/A | 700-800 | |||||
| Protege (2) | 650-750 | 700-800 | |||||
| 626 | |||||||
| 2.0L | 550-850 | 500-800 | |||||
| 2.5L | 550-750 | 550-750 | |||||
|
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| Application | Man. Trans. | (1) Auto. Trans. | |||||
|---|---|---|---|---|---|---|---|
| Miata | 9-11@ 800 | 9-11@ 800 | |||||
| Millenia (2) | N/A | 6-8 @ 650 | |||||
| MPV | N/A | 4-16 @ Idle | |||||
| Protege (2) | 9-11 @ 750 | 9-11 @ 750 | |||||
| 626 | |||||||
| 2.0L | 6-18 @ 550-850 | 6-18 @ 500-800 | |||||
| 2.5L | 4-16 @ 550-750 | 4-16 @ 550-750 | |||||
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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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