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
VTEC Valve Inspection
- Disconnect the 2P connector from the VTEC solenoid valve.
- Measure resistance between the YEL (front) or BLU/YEL (rear) terminal and body ground. See Fig 1 .
- If the resistance is within specifications, remove the VTEC valve assembly from the cylinder head, and check the VTEC valve filter for clogging. See Fig 2 . If there is clogging, replace the engine oil filter and engine oil.
- If filters are normal, push the VTEC solenoid valve with your finger and check its movement. See Fig 3 . If VTEC solenoid valve is normal, check the engine oil pressure.
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.