[dana44]

The 33, 35, 37 codes are indicating there is a short associated with the AC, which is affecting everything else from the looks of it (it is tied in with the idle control circuit/speed).
the 13 is the idle circuit/vacuum line problem.

They all seem to be related problem and sound like it is the place to look first, so a slight wiring short somewhere prpobably, or dirty connection. Here is the codes, and if you read them, they will make sense.
http://www.allpar.com/fix/80s-codes.html

 

[dana44]

AC associated or not, the codes point to something non-AC you can check, think it was the radiator fan. Look into this part first, it ties into the electronics of the idle circuit stuff and is messing everything up. There is mention of a vacuum line, too.

 

[dana44]

Worth a try. Have you looked at what the codes are and try to figure out how they all relate to each other, look at items associated with each other and the way she is running?

 

[dana44]

I would say so. Hope this all helps, might breathe a little more life into the little jewel.

 

[dana44]

Good deal.

 

[dana44]

Get in there with some penetrating oil on the cable at the handle itself, then release it, do it again a few times, should loosen up after used several times, and check to see where under the car you can squirt some fluid on it, the sheathings can get rusted, from the sounds of it.