Rattling PCV when idling

finnstanger

Well-known member
PCV is making rattling noise when the engine is idling. Is that normal? I think it is a problem because I can't get smooth idle. Could it be a sign of leaking exhaust valve or missing fire in one cylinder. As cold the engine is running fine when the choke is on, but of course revs are higher.
 
Most likely just needs cleaned pull it and spray some carb cleaner in it. Mine in my 466 does this sometimes. it gets pluged with oil some times and sticky.
tim
 
If the engine has a miss on one cylinder consistantly, the vacuum signal to the PCV will pulse, causing it to rattle.
Fix the miss, fix the rattle.
 
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