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 SYSTEMSPOSITIVE CRANKCASE VENTILATIONTESTING AND INSPECTIONSYSTEM QUICK CHECK
1982 Mercury Capri L6-200 3.3L
System Quick Check
1982 Mercury Capri L6-200 3.3LSECTION System Quick Check
PROCEDURE
A quick check of the system can be made by pulling the end of the valve out of the valve cover and, with the engine idling, placing a finger over the end of the valve to block the air flow. A vacuum should be felt and the engine speed should drop approximately 50 rpm if the system is satisfactory. If there is no change in engine speed a clogged system is indicated. To isolate the problem, remove the valve from the hose.
If the ventilator hoses and carburetor passages are clear, a strong vacuum will be felt and the engine idle will change drastically or the engine will stall when the end of the hose is uncovered. If this occurs, the trouble is in the valve. If the engine continues to idle approximately as it did before the hose was uncovered, the hoses or carburetor passages are blocked.
A quick check of the system can be made by pulling the end of the valve out of the valve cover and, with the engine idling, placing a finger over the end of the valve to block the air flow. A vacuum should be felt and the engine speed should drop approximately 50 rpm if the system is satisfactory. If there is no change in engine speed a clogged system is indicated. To isolate the problem, remove the valve from the hose.
If the ventilator hoses and carburetor passages are clear, a strong vacuum will be felt and the engine idle will change drastically or the engine will stall when the end of the hose is uncovered. If this occurs, the trouble is in the valve. If the engine continues to idle approximately as it did before the hose was uncovered, the hoses or carburetor passages are blocked.
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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.