F53 AC high side pressure (2008 - 134a) at 90F
Can't find it in any of my manuals. websites suggest 250 psi but wondered if that's correct. Other sites say 134a is very sensitive to the right pressure.
Forum Discussion
spotrot wrote:
Thanks,
Most website charts show 45-55 low side, and mine is at 50.
The high goes from 275 at idle to 320 when held at about 2000 rpm for a while.
An old (R-12 era) GM manual says to take the readings at 2000 rpm but I haven't seen that elsewhere.
My Chart is from the largest supplier of Dash AC systems for RV's--Evans Tempcon. Doug
