Ford Focus Forum, Ford Focus ST Forum - View Single Post - RPM's stay high or vary randomly at idle
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Old 02-17-2013, 01:32 PM   #4
whynotthinkwhynot
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Not really, as long as you're on those settings the AC idle is going to be set.

Which engine do you have? Have you checked the usual suspect- the PCV valve line? That or any other vacuum leak you can find under the hood by listening for a hiss. Follow the VECI vacuum schematic for locations. Just trace down the lines- there are only about 5 or 6.
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