Where is the a/c low pressure service port on an 85 bird? Not sure what I am runing as the "R" factor is. If I put something different in whats the damage?

 

your low pressure service valve should be on the accumulator which is the big silver canister and your refrigerant should be r12 if its an 85 which means your gonna have to get somone with a license to get you some "r12 is really really really expensive" or you can switch to r134a which they sell a kit at autozone to do that you will need to change your orifice tube and your accumalator and drain all the oil outta y our system and that should be all that you need to do ;-P.

 

Ah thats why this tune-up bottle I have looks like it wont fit the low point fitting. There is another fitting on one of thelines between the compressor and the accumulator.. what is that? I'm missing one of the caps on the accumulator are they "really" needed or are they like a dust cap?

 

the cap only stops freon from leaking outta the valve if its bad or has a little leak its not majorly important but you its better to get them and put them on they are cheap

 

So i can pick them up @ autozone? Even if it is an R12 fitting?