A/c idel up wont work

What is your question?

When I turn on my AC the idle does not go up anymore the idle up isn't working somebody said it had something to do with the throttle body but mine's naturally aspirated so I'm a little bit baffled at this one

What makes this problem better or worse?

AC works fine everything is normal

How long has your 1996 Geo Metro had this problem?

Ever since I had a new gas tank put in