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 Acura NSX AutomaticFACTORY OEM SERVICE PROCEDURE
Intake Air Bypass (IAB) Control System: Testing
- Check the IAB control valve shaft for binding or sticking.
- Check the IAB control valve for smooth movement.
- Check that (A) of the IAB control valve is in close contact with the stopper when the vacuum hose is disconnected from the IAB control diaphragm. See Fig 4 .
- Check that (B) of the IAB control valve is in close contact with the full-close screw when you apply 15 in. Hg (380 mm Hg) of vacuum to the IAB control diaphragm. See Fig 5 .
- If any fault is found, clean the linkage and shafts with carburetor cleaner.
- If the problem still exists after cleaning, disassemble the intake manifold and check the IAB valve body assembly. See 3.0L V6 -- NSX & NSX-T article.
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.