Engine Size: 350
Refrigerant Type: 134-a
Ambient Temp: 89
Pressure Low: 45
Pressure High: 200
Country of Origin: United States
I re did the air in my truck the beginning of the summer. It has never cooled very well, especially at idle. I replaced, compressor, condensor dryer and the line set on the compressor. I got the guages out and tested them this weekend.
When I did the test the weather radio said it was 89 degrees at a town 30 miles from me. The report was 30 minutes earlier so I think it may have been even hotter.
Had wife hold the accelerator at around 1500 rpm. AC on max windows down. Low pressure started at 45- 50 and after about 2 minutes it slowly creeped down to 40. It stayed at 40. took a few minutes to creep down. High side was right at 200. I dont like my vent thermometer too much but it looked like it said 64 degrees.
before I did this test ttruck had idled for about 10 minutes. (Maybe a little less)
When I pulled the high and low pressure hoses off, oil chot out of both hoses. I am not sure if this is normal or not. I put the recommended pag oil that was given to me when I installed everything. I put part in the compressor, part in the dryer, part in the condensor.
Problem with truck is it wont cool well at idle or when first taking off. It seems it has to go down the road at interstate speed for 3 or more miles before it really starts to cool. Fan clutch has been replaced. When I turn the heater on hot air comes out so I assume the temp door is working.
One other thing is while reving it I dont think the compressor is cycling off. It just stays on. The compressor was a new one not rebuilt from autzone.
I appreciate any advice.
By the way, when you are trying to achieve the pressure on those charts should you be at idle or 1500 rpm like I was?
I got to thinking. One of the cans I put in the truck when recharging with 134 had stop leak mixed with the 134 a. This was not intentional but I put the can in anyway. It was only one can. Would this hurt or cause the problem I am having?
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