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Mar 29, 2015 | 06:41 PM

VancetheVolvo

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Boost vacuum leak

I just did a pcv replacement on my 98 S70 GLT 180k miles and while the car was on the lift I noticed the compressor vacuum line was completely disconnected. Could this be what's responsible for the rough idle?

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Apr 5, 2015 | 04:12 PM

mt6127

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Joined: Mar 2012

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From: Burlington, VT

yes, vacuum leaks/ torn tubes are the most common cause of idle problems. Surprised that you don't have a check engine light with codes going on as well.