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.
1996 Lexus SC 400FACTORY OEM SERVICE PROCEDURE
Throttle Controls: Dashpot
- Run engine at operating temperature. Ensure idle speed is 650-750 RPM. See CONNECTING TACHOMETER under ENGINE/VIN ID article. Turn off engine. Remove cap, filter and separator from end of dashpot. See Fig 1. Start engine. Increase engine speed to 4000 RPM. Ensure coolin g fan is not running.
- Fully extend dashpot rod by using finger to cover hole inside area where separator was installed in dashpot. Release throttle. If engine speed is not 2500 RPM, turn dashpot adjusting screw as necessary. Installing separator, filter (coarse side up) and cap.
Factory Service Tools
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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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