WHen does a PCV valve go bad? How can you tell? on 2002 Mazda B2300

Years ago I broke off porcelain from the spark plug which fell into the engine. Uses oil ever since. Now it is running roughly, at 72000 miles.

by in Sylva, NC on December 27, 2011
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1 answer
ANSWER by , December 27, 2011
have a compression test done on that cylinder. have them do a wet and dry to see if there is ring damage. the damage may be surfacing now from that action. Roy