Focus Fanatics - View Single Post - Yet another high idle problem
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Old 10-01-2012, 10:58 PM   #13
Focus Fanatic
Join Date: Mar 2012
Fan#: 96610
Location: Fort Worth, TX
What I Drive: 00 wagon, 02 sedan both zetec atx

Posts: 4,593
FF Reputation: 23 amc49 Great Standing Member
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The statement made that vacuum leaks were constant and do not come and go is absolutely and totally incorrect. On these cars they commonly come and go when the PCV line at the intake attachment point bubblegums up to suck a slight hole in it. That hole can leak and then reseal to not leak as the little flap of torn loose material flaps around in the hole. I've seen problems then suddenly it straightens up and runs fine for several months only to do it again.
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