1984-1995 Honda Accord/Prelude Emissions PVC testing

The PCV valve is easily checked with the engine running at normal idle speed (warmed up). Gently pinch the hose shut, then release it; the valve should click. If there is no click, check for plugged hoses or ports. If these are open, the valve is faulty. With the engine OFF, remove the valve from the engine. Shake it, listening for the rattle of the plunger inside the valve. If no rattle is heard, the plunger is jammed (probably with oil sludge) and should be replaced. Never operate the engine without the PCV valve or with the hose blocked.
Don't blow directly into the valve in an effort to free the plunger; petroleum vapors and deposits within the valve are harmful.
REMOVAL & INSTALLATION
Remove the PCV valve from the valve cover or intake manifold. Remove the hose from the valve. Take note of which end of the valve was in the manifold. This one-way valve must be reinstalled correctly or it will not function properly. While the valve is removed, the hoses should be checked for splits, kinks and blockages. Some models, are equipped with a breather port and filter on the side of the air cleaner which should also be inspected at this time. Replace the filter if it is dirty or saturated with oil.

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