Where's the low pressure valve?

[Allen Brandt]

Where's the low pressure valve for the A/C? I'd like to put a gauge on there to make sure it's at the top of the normal range, since it's over 100 here.

 

[Dre L]

Right on the black thing that has a lot of condensation when your AC is on MAX cold. near the passenger side firewall, it has a black cap.



Make sure the AC is on MAX full throttle when you connect the gauge.

 

[Tom Schindler]

The low pressure side, as nobleman said, is on the right hand side of the vehicle. (from the drivers perspective) There should be two different sizes, so you really cant get it wrong.



On a lighter note, on my girlfriends Grand Am, the high and low pressure ports are under the vehicle on the AC compressor. You actually have to put the vehicle on either jack-stands or ramps to charge the system. Talk about a pain in the butt.





Tom

 

[Allen Brandt]

Found it, thanks. I'm right at the bottom of the normal range, so I'll get a can tomorrow and add some freon/oil mix to the system to get it closer to mid point.