[DG Boxster]

The good news is that the oil level is right where it always has been (full on the dipstick, and full on the electronic gauge).

The better news that that there was no smoke at startup.

BUT - I took Tucker2's advice and opened up the oil cap when the engine was warmed up. There is definite suction that you can hear and feel. When I remove the cap the engine idle gets uneven.

I can't tell if this is "strong" suction, but it certainly isn't faint. I have a vacuum gauge I could hook up there somehow if there was a good/bad spec for the AOS.

I don't want to tear into this if it is OK... but if it's bad I'll do it. I just need to know the difference for sure. For all I know it has been this way for 3000 miles as I never pulled the oil cap when it was running before.

Thanks for any advice!

dave