replaced aos still smoking, please help :-)

[barks]

hi all,
i have just bought an 02 plate boxster 2.7l cheap because it smokes if not driven very gently.

went to porsche and bought a new aos

replaced yesterday also cleaned all intake, throttle body ect, theres was crud i dug out of the pipe that goes to pcv,

started car - no smoke, reved it up a few times still no smoke, assumed it was fixed, put it back together.

drove it 10 miles, gave it a bit of kicking and it was great no smoke, turned into my road 2nd gear and heard a hannibal lecture type noise for about 1 second then massive ammounts of smoke. :-(

car now smokes badly on startup, thinking it may be some residual i took it out and it cleared for a bit then came back.

if i undo the oil filler cap with car at idle the filler hose pops up under pressure, (is this normal?) but i can easily remove the cap.

if i cap off the intake pipe connection will it be safe to use and if the smoke stops is it maybe pcv stuck causing the issue?

i dont want to damage it, could it still be residual or can i test pcv at the aos pipe?

many thanks
barks