Losing Pressure - To Crankcase??

[REDBLUR]

When ever I check for boost leaks on my car using the intake leak tester, I am losing all of my pressure out of the oil dipstick tube, oil cap, and pcv tube. Is this normal, or am I experiencing huge blow by in the cylinders/head?? When I plug these areas, I hold pressure fine.

The car is a 90 TSi, never been boosted past stock settings, 9-11 PSI (15 PSI twice, and yes I have a boost guage).

This car has never been beat on and has 100,000 kms. Any insight on to why this is all happening, or is this normal??

Thanks,

 

[ProStreetOnline]

Some blow by is normal, but usually blowing the dipstick out, is an indication of too much.

Did you do a compression test?