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 MANUALSMERCURY1982CAPRI L6-200 3.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSAIR INJECTIONAIR INJECTION CHECK VALVETESTING AND INSPECTION
1982 Mercury Capri L6-200 3.3L
Air Injection Check Valve: Testing and Inspection
1982 Mercury Capri L6-200 3.3LSECTION Testing and Inspection
1. Check valves should be inspected whenever the hose is disconnected from the valve or check valve failure is suspected.
NOTE: Any indication of exhaust gases in the air pump indicates check valve failure.
2. Orally blow through the check valve (toward air manifold) then attempt to suck back. Flow should be toward air manifold only.
3. When replacing a check valve, be careful not to bend or twist the air manifold.
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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.