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.
1991 Geo Prizm LSi, StandardFACTORY OEM SERVICE PROCEDURE
Ignition Timing
IGNITION TIMING (Degrees BTDC @ RPM) (1)
| Application | Man. Trans. | Auto. Trans. | ||||
|---|---|---|---|---|---|---|
| Prizm | (2) 10 @ 700 | (2) 10 @ 700 | ||||
| Prizm GSi | (2) 10 @ 800 | (2) 10 @ 800 | ||||
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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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