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.
1994 Acura NSX AutomaticFACTORY OEM SERVICE PROCEDURE
Dashpot System
The dashpot is employed to slow the closing of the throttle valve during gear shifting or deceleration. See Fig 1 .
- Check the vacuum line for leaks, blockage or a disconnected hose. See Fig 2 .
- Disconnect the vacuum hose from the dashpot diaphragm, and connect a vacuum pump to the hose.
- Apply vacuum and check the speed the vacuum goes out. Vacuum should go out slowly. If the vacuum holds or goes out quickly, replace the dashpot check valve and retest.
- Connect a vacuum pump to the throttle valve dashpot control diaphragm. See Fig 3 .
- Apply vacuum and check that the rod pulls in and vacuum holds. If the vacuum does not hold or the rod does not move, replace the dashpot diaphragm and retest.
Factory Service Tools
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.