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.

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HOMESERVICE MANUALSHONDA2006INSIGHT STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMEVAP SYSTEMEVAP TWO WAY VALVE TEST2000-2005 MODELS

2006 Honda Insight Standard

2000-2005 models

2006 Honda Insight StandardSECTION 2000-2005 models

Remove the fuel fill cap.
Disconnect the vapor line from the EVAP two-way valve (A), and connect a T-fitting (B) from the vacuum gauge and the vacuum pump/gauge, 0-30 in.Hg, to the hose as shown.

Fig 1: Connecting T-Fitting From Vacuum Gauge And Vacuum Pump/Gauge To Hose
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Apply vacuum slowly and continuously while watching the gauge.
The vacuum should stabilize momentarily at 0.8-2.1 kPa (0.2-0.6 in.Hg, 6-16 mmHg).

If the vacuum stabilizes (valve opens) below 0.8 kPa (0.2 in.Hg, 6 mmHg) or above 2.1 kPa (0.6 in.Hg, 16 mmHg), install a new valve, and retest.
Move the vacuum pump hose from the vacuum fitting to the pressure fitting, and move the vacuum gauge hose from the vacuum side to the pressure side (A) as shown.

Fig 2: Moving Vacuum Gauge Hose From Vacuum Side To Pressure Side
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Slowly pressurize the vapor line while watching the gauge. The pressure should stabilize momentarily above 1.0 kPa (0.3 in.Hg, 8 mmHg).
- If the pressure momentarily stabilizes (valve opens) above 1.0 kPa (0.3 in.Hg, 8 mmHg), the valve is OK.
- If the pressure stabilizes below 1.0 kPa (0.3 in.Hg, 8 mmHg), install a new valve, and retest.

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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.