Need some A/C help - ZR-1 Net Registry Forums

Ccmano · 08-07-2020

A/C is not my strong suit and this one has me stumped. Recently replaced the condenser, accumulator/drier, orifice tube and compressor hoses. Evacuated the system for 30min and vacuum held. Charged the system with 30oz. R134a and 4.5oz PAG100. The compressor runs and the system cools but only down to about 55 degrees outlet temp at idle.

Now here's the really strange part. The low side pressure is in the mid 30psi range, about right from what I understand. The high side is zero! The system generates so much heat at the condenser that the car cannot idle indefinitely on a 90 degree day with the AC on. Coolant temps just keep climbing with fans coming on a 203 degrees.

I'm thinking bad compressor and/or obstruction on the high side. Strange that high side pressure is zero but the compressor runs and there is some cooling.

Thoughts?
H

08-07-2020	#1
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Need some A/C help A/C is not my strong suit and this one has me stumped. Recently replaced the condenser, accumulator/drier, orifice tube and compressor hoses. Evacuated the system for 30min and vacuum held. Charged the system with 30oz. R134a and 4.5oz PAG100. The compressor runs and the system cools but only down to about 55 degrees outlet temp at idle. Now here's the really strange part. The low side pressure is in the mid 30psi range, about right from what I understand. The high side is zero! The system generates so much heat at the condenser that the car cannot idle indefinitely on a 90 degree day with the AC on. Coolant temps just keep climbing with fans coming on a 203 degrees. I'm thinking bad compressor and/or obstruction on the high side. Strange that high side pressure is zero but the compressor runs and there is some cooling. Thoughts? H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. Last edited by Ccmano; 08-07-2020 at 06:44 PM.