If you don't have an air compressor, go buy or borrow one. Any small one will do.

Disconnect the low side where the low side port is (the big nut), and disconnect the high side at the receiver drier. Take an air hose and connect it as best you can to the high side. I used the "air cleaning tool" thingy that comes with compressors. You just jam the tip in there and let it rip. If the tool builds pressure and pops out, then you know the blockage is somewhere in the evap or one of the hoses on the way there.

If air flows well, then you know the blockage is somewhere in the front of the car. Start disconnecting stuff one by one until you find the blockage.

You are doing a lot of replacing and not quite enough diagnosing.

Report back.

__________________
Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2