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Diagnostic - PCV Valve? S70 1998

And if you throw more money at it without a definitive answer, you will waste even more.
There is a vacuum line from the charcoal canister, through a check valve, and into the intake manifold. If that vacuum line has a hole, it is an easy fix. If it is the check valve, then it is expensive.
A dealer will charge you for diagnosing the problem. A very good independent VOLVO mechanic will be more reasonable.

Klaus
--
The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)






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