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.
Engine Start-up Mode
When the starter motor is engaged, the ECU receives inputs from the CTS and speed sensors, the starter motor relay, and the wide open throttle switch. The fuel pump is activated by the ECU and voltage is applied to the injector, with the ECU controlling injection time.
The ECU determines proper ignition timing from the speed sensor input. If the wide open throttle switch is engaged, the ECU will deactivate the injector to prevent flooding.
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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.