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.
Electronic Ignition Timing Advance
Ignition timing is controlled by PCM. PCM receives signals from various sensors indicating engine status. PCM computes appropriate spark timing and signals distributor to change timing. No vacuum or mechanical advance mechanisms are used. If ignition signal is not present at PCM, DTC P1300 can set in PCM memory. For testing procedures, see the TESTS W/CODES article. Ignition timing is not adjustable. To check ignition timing, see IGNITION TIMING in the ADJUSTMENTS article.
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.