I just replaced a PCV Valve on my 1995 Escort. The PCV valve had around 160K miles on it and did not rattle nearly as good as the new one. The new Motorcraft one I bought off Amazon does seem to make it idle better and I could only blow air through it in one direction. Supposedly the cheap aftermaket PCV valves you see in the stores leak air backwards. It will be interesting to see if this changes my oil consumption.
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