My buddy is telling me that there is a screw in the A/C system that allows you to "tweak" the pressure in the system....dropping it SEVERAL degrees with just a nudge. Anyone know if this is an old wives tale or is there truth behind it?

 

I can't say for sure if the F-body has one but last summer,much to my buddy's suprise,there turned out to be a "magic screw" on his Jeep Grand Cherokee that made his AC go from almost nothing to nice & cold,go figure,I couldn't believe myself,but it worked.His is around 10 or so yrs old so who knows,we may have one too.

 

So anyone have info on this? There has to be someone with a GOOD diagram of the entire AC system so we could track down likely areas

 

I'll probably be ripping out the rest of my a/c system sometime in the near future so if I see something, I'll post it.

 

Nope, no magic screw. When this was first posted I looked at my electronic service information and there is nothing there.

http://www.gmesi.no-ip.com

This is on my home system, so please be kind and keep the link on the DL.
The expansion valve is fixed.

 

I think that it has something to do with the pressure that is allowed into the system...seems like there should be an adjustment somewhere on there...or at least a way to tweak the pressure sensor so you get just a hair more?

 

Im the one that told chicago t/a about this screw. I guess its what controlled the pressure before it turned the compressor off. Something like that, i heard baout it on the impala ss forum and i know the B-Body LT1sd had a lil screw. It needs just a VERY TINY adjustment to change the pressure. I guess its a tiny screw recessed deep in a hole, im gonna go try and get mor einfo on this.

On a side note my 95 t/a will damn near freeze yo outta the car with the sun beating through the t-tops and my cars black with a dark grey interior. BRRRR

 

Hell yeah it will.....cha friggen burrrr