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.
1986 Toyota Pickup Base, 22-RTE, R151FFACTORY OEM SERVICE PROCEDURE
System Testing: Federal
- Check condition of all hoses and tubes. Remove air suction hose from air switching valve. Verify bubbling noise is heard from air switching valve at idle.
- Disconnect vacuum hose from air switching valve. Bubbling noise should not be heard from air switching valve at idle. Reconnect vacuum and air suction hoses.
- To check vacuum control valve, race engine and quickly close throttle valve. Bubbling noise should stop momentarily. If system does not operate as outlined, check each component. See COMPONENT TESTS.
Factory Service Tools
Use the Manual With the Right Hardware
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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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