I suspect you could pressure the fuel filler and listen for the leak... good luck!

John, thanks, I should have been explicit... mine is NA but the principle is likely identical. So the vacuum line is actually extracting PCV gas from the throttle region when the car is at idle, and is thus prone to blockage. I'm thinking about increasing the diameter of the vacuum line to delay the...

I've read through the discussions, but is there resolution on the functionality of the "PTC Nipple"? From the photos I see a metal aperture restricting the PCV flow to the inlet manifold and a vacuum connection. A vacuum driven valve? (perhaps to prevent PCV backflow contaminating the mass...

FYI, you can fix this without dropping the tank.... which is a whole bunch quicker and easier!

https://www.matthewsvolvosite.com/forums ... ic#p275475

1994 850 GLT Wagon. I've read excellent posts on diagnosing fuel tank vent line leaks (gas smell if you fill beyond 14 gallons). My case was typical, and having removed the fuel pump and fuel sensor plates in the trunk, with eyeball very close to the deck I confirmed that there was indeed a crack at...