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.
1983 Honda Prelude AutomaticFACTORY OEM SERVICE PROCEDURE
System Testing
- Disconnect the lower air suction hose from anti-afterburn valve and plug. Remove air cleaner cover and filter. Start the engine and check for a bubbling noise at air suction port at idle. A bubbling noise should be heard. If so, proceed to step 4).NOTE: For California vehicles only, perform this test on cold engine only. On Federal and Hi-Altitude cars only, if the engine is hot, check for the bubbling noise within 3 minutes after starting the engine.
- If bubbling noise is not heard, check for voltage at air suction control valve (Yellow/Green wire). If there is no voltage, proceed to Troubleshooting. If voltage is present, disconnect vacuum hose from air suction diaphragm.
- If there is no vacuum, check for leaks or disconnected hose. If okay, replace air suction control solenoid valve and retest. If there is vacuum replace the air suction cut-off diaphragm and retest.
- Raise engine speed to above 3150 RPM. A bubbling noise should not be heard. If noise is not heard, test is complete. If bubbling nose is heard, check for voltage at air suction control solenoid valve (Yellow/Green wire).
- If there is voltage, go to Trouble Shooting. If there is no voltage, replace the air suction control valve and retest.
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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