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.
Timing Advance System
Ignition timing advance is controlled by the ECU based upon sensor input signals which reflect ignition timing needs. If timing problems are experienced, inspect input signals for proper operation. See appropriate component or ECU pin voltage charts in - PIN VOLTAGE CHARTS article. Inputs which help control timing include the following:
- Crank angle sensor
- Airflow meter
- Coolant or cylinder head temperature
- Idle switch in idle position
- Ignition switch crank signal.
- Battery voltage
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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