[s-cars] Pressure test for Vacuum Leak ?'s

[Jim Fleischer]

Hey all,

Still trying to track down my "lean out" at high RPM issue.  Haven't dealt with the ECU yet, trying to find out if it's a vacuum leak first.  I have a hookup that I made for my old urquattro, but it doesn't fit the intake hose on the AAN (hookup is too big for the AAN hose to fit over.) Went to the local plumbing supply and seems like there isn't anything off the shelf that fits this intake hose easily, so I'm wondering what others have done?
That said, I was able to cobble together a makeshift setup that pressurized to 5-10psi before blowing off.  The cap on the oil filler was leaking a bit (my new replacement was even worse!) but that is about all I could hear before blowing off.  What psi are people running when checking for leaks?  I think I may have heard something at the rear of the motor but can't be sure until I have a more reliable setup.
Any help or BTDT much appreciated! Thanks!

Best regards,

Jim Fleischer
'95 urS6 avant