ehuron

I've replaced my entire AC system (all components). Compressor (2) were AC Delco oem (not remans). I've changed the orifice twice. Still can't get the low side below 60. High side is fine. Low side stays at about 60 steady, which I believe suggests a blockage. I did notice that there was an orifice that was $42.00 available. What makes a stock $2.00 orifice worth $42.00. Only thing I haven't tried was the old R12. Anyone have this problem after replacing their AC system even though I used all GM OEM parts?

ehuron

I forgot to mention, ac blows cold going down the highway but barely cool in traffic. Won't get below 65 at vent.

PDQC5

Have you checked the condenser to see if the fins are plugged up? I didn't realize how bad they plugged up until I removed the radiator and tried to look thru it

ehuron

yes. everything (all parts) are new.

92GA

Sounds like it may be over charged. Did you evacuate and weigh in the charge? Or just dump some gas in? The more gas you put in the higher the suction pressure will get, until it get liquid logged, then it won't work at all. Remember the compressor won't pump liquid and it will lock up.

ehuron

Yes we have checked. I'm having this done with an ac tech. He has all the required equipment. We've installed the exact amount, a little over, and a little under. Just can't get the low side under 60lbs.