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.
ORVR Vent Shut Valve Float Test
Ensure fuel tank is less than half full. Remove fuel filler cap to relieve fuel tank pressure, then reinstall cap. Remove fuel hose joint protector. Disconnect ORVR vapor recirculation hose and connect to vacuum pump/gauge. Plug ORVR vapor recirculation pipe. See Figure. Apply vacuum to ORVR vapor recirculation hose. If vacuum holds, replace ORVR vent shut valve. If vacuum does not hold, the float is okay. Perform valve test. See ORVR Vent Valve Test .
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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.