ok guys I need some help. My vents stop blowing air upon acceleration. I have checked the faq. I am trying to look for a new check valve like it says. I can not find one. I have been to junk yards. I can not find one online. Is there a proper name and I am not entering the name right on auto parts web sites. I am also loosing power when the a/c clutch engages. I need to get my a/c charged. The last time I went to a mechanic he told me I had a leak. He let it out of the system. It was fine before I went in. Anyway I am not running my a/c. when I do turn it on for a second I have noticed that the clutch engages often because of low freon. This is when I lose power. Have I confused everyone enough. My questions are.

1) what is the name of this black and white check valve and any ideas as to where I can find a replacement?

2) Is it common to loose some power when the a/c clutch engages or do I have another problem?

I will appreciate any help that I get. Thanks and sorry for If I confused anyone.