Resolved AC system pressure

[miliman13]

Problem, when i drive Hwy speeds my vent temp rises, instead of dropping.




Low side : 60PSI
High side: 180PSI
Vent Temp: 50F
Ambient Temp: 90F
Conditions: Idle, Shaded area.






Based on this information what can you tell me?


Not enough freon ?
To much?
Evap?
Valve? Ect??
Note, i accidentally let out a tiny bit of R and one change was the vent temp rose to 55F

Thank you

 

[miliman13]

Watch your compressor. Is it kicking on and off as the pressure rises? If so the high pressure switch is kicking it off so it doesn't get hurt (meaning it may be a bit high). I'd drive it and if it doesn't work out or the high pressure seems to be kicking it off, put some back in that empty cylinder and see if it quits, or pay the shop a good chunk of your wallet.... If we all work on our DSM's, this should be something we do to, with the proper tools, just like the rest of the things on our cars. I am glad at least one of mine still has A/C!

Thanks...
This ain't g35 driver. Com
Were all the responses are " meh go to dealer.....meh get a professional"
One would think, this is another task that gets done....

Like idk building a long block, machining your own clearances, doing your own valve geometry.. So forth and so forth..

Apparently not..

 

[1990TSIAWDTALON]

I am sure that you can handle doing this yourself, I was just poking you on the "good chunk of your wallet" deal. I have been servicing mine and my families for quite a few years. You just need the proper tools like every job.

 

[miliman13]

For updates sake....

She interpolates between 46-56f
While City /hwy speeds.
Averaged (50f most of the time)

Had The manifold up against the windshield and noticed low side also proportionally interpolated been what looked like 20-40psi..

Much better than before.. Not perfect, but it's good enough for now.