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.
1997 Lexus SC 400FACTORY OEM SERVICE PROCEDURE
Engine Controls - Adjustments: Dashpot
- Warm engine. Ensure idle speed is 650-750 RPM. Remove cap, filter and separator from end of dashpot. See Fig 1. Start engine and raise engine speed to 4000 RPM. Use finger to cover hole inside area where separator is normally installed in dashpot. Release throttle valve. This will fully extend dashpot rod. Check engine speed (ensure cooling fan is not running).
- If engine speed (dashpot set speed) is not 2500 RPM, rotate dashpot adjusting screw as necessary. When installing separator, filter and cap, install filter with coarse side facing away from dashpot.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.