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It's not exactly an answer, but if it's any consolation I've got the same aperture (and it's so dirty it looks as though it's never had anything fitted. The only thing our cars have in common is the manufacturer Maybe it helps prevent water being sucked in through a low down intake by providing an alternative air route for trickle amounts of air (e.g. ...


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With respect to measuring the health of the PCV system there appears to be a special vacuum gauge in a small pressure range capable of measuring the subtle vacuums expected in the crankcase. The diagnostic part is Volvo P/N 9997226 and there's an associated article detailing the acceptable ranges... Volvo Crankcase Testing Here is a good procedure to ...


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It has to get HOT. As you seem to know and elude to by asking if sitting and idling at a higher RPM could resolve the issue. If the car is fit can you just drive it in a lower gear at a higher RPM? Not savagly high like a teenager but reasonably high. If you would be in 5th on the freeway can you drive it in 4th? Some DPF's can get seriously clogged up ...


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From SwedeSpeed: "It can range from a bad speed sensor, ABS sensor, bad yaw sensor, steering wheel position sensor of even a bad DEM." Scan for fault codes.


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I don't think a battery with a higher CCA is going to help, but a new battery in and of itself might help. I'd have it tested and see if it's voltage is where it needs to be. If the battery is worn out, you might be seeing the issues you are having. Putting a higher CCA battery will not do anything to improve your situation, unless the one which is in it is ...


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