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.
Retard Components
All models except 9000 Series Turbo are equipped with a knock sensor. On 9000 Series Turbo, knock sensing is accomplished by the ECM; no discrete knock sensor is used. 900 Turbo vehicles are equipped with a retard cylinder on the distributor, which retards timing in response to increasing boost pressure. Except for those components, all retard functions are controlled by the ignition ECM. See KNOCK SENSOR (EXCEPT 9000 SERIES TURBO) and RETARD CYLINDER (900 TURBO) .
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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.