I've got a '91 tt rolling chassis that I bought from a guy who converted to r134a and said there is a leak somewhere in the system but wasn't sure where. He thought it may have been the low-side ac line that goes by the front crossmember but I pulled it out and didn't find any holes. All o-rings were replaced and was told that the a/c compressor is new. The system had some residual freon in it but wasn't pressurized. Is there a good tool I can rent to troubleshoot? Also, are there any lines/components inside the cabin that may require attention? The pics for the TSV (throttle suction valve) writeup aren't showing up on my iPhone. I am awaiting a more specific response of symptoms from the seller. Thanks.
