I retofitted my system to 134a. I flushed the condensor and drained the compressor of the mineral oil. I refilled with ester oil, replaced the drier and pulled a vacuum. I then filled with refrigerant and have only added about 20 ounces at this point. The sytem calls for about 30 ounces and here are the pressures that I am currently getting. This is from a post I made on a different forum:
ok, here is what I have going on now:
This morning the pressures seemed a lot better. The low side was about 20 at idle and high was 150 with a/c on. I added about 1/4 can of gas into the low side. The pressures seemed to get to the upper limits of 35-40 low side and about 225 high side. I then drove the car around for 15 minutes, came back and reconnected the gauges. The gauges now read low again at 30 on the low and 200 on the high. We then put another 1/4 can in, which would mean there is now 2 cans of the 2 1/2 that should go in. The low pressure is now 40-45 and high at almost 300. When I then went for a drive the duct temp would only get to about 62 degrees and it is 78 degrees outside. After driving for another 15 minutes, I came back and put the gauges back on. The gauges then read 40 for low side and 175 for high side at idle. When I bring the rpm up to about 2000, the high side approaches 300. I then shut everything off and the low side goes up to about 100 and the high goes down to about 150. Any thoughts? I still have bubbles in the receiver dryer site glass and am still under the amount of refrigerant that I should have added. I am confused. Sounds like a restriction, but why and where?
ok, here is what I have going on now:
This morning the pressures seemed a lot better. The low side was about 20 at idle and high was 150 with a/c on. I added about 1/4 can of gas into the low side. The pressures seemed to get to the upper limits of 35-40 low side and about 225 high side. I then drove the car around for 15 minutes, came back and reconnected the gauges. The gauges now read low again at 30 on the low and 200 on the high. We then put another 1/4 can in, which would mean there is now 2 cans of the 2 1/2 that should go in. The low pressure is now 40-45 and high at almost 300. When I then went for a drive the duct temp would only get to about 62 degrees and it is 78 degrees outside. After driving for another 15 minutes, I came back and put the gauges back on. The gauges then read 40 for low side and 175 for high side at idle. When I bring the rpm up to about 2000, the high side approaches 300. I then shut everything off and the low side goes up to about 100 and the high goes down to about 150. Any thoughts? I still have bubbles in the receiver dryer site glass and am still under the amount of refrigerant that I should have added. I am confused. Sounds like a restriction, but why and where?
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