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Won't take charge

BigDoe on Sat June 14, 2008 12:10 AM User is offline

Year: 1990
Make: Cadillac
Model: Fleetwood Brougham
Engine Size: 5.7
Refrigerant Type: 134
Pressure Low: 25
Pressure High: 15
Country of Origin: United States

Ok so i bought this car that had been sitting for several years. The system was last charged and converted back in 1999.

I had the system open for a few months while i rebuilt the motor and other work under the hood. I put everything back together and finally ready to do the A/C. I replaced all the o-rings with new green ones.

Now i have run the vacuum several times. The last time i did it twice, 30 min. each. With 10 mins in between. It did not loose vacuum after sitting either. Once i hook up the refrigerant on the low side it will only take about 6 OZ. Just enough so that the system will kick in the compressor.

BigDoe on Sat June 14, 2008 12:38 AM User is offline

I just double checked, the sytem is reading 25 on the high and low side.

TRB on Sat June 14, 2008 1:30 AM User is offlineView users profile

Would not be the first time something crawled into a line and plugged it. Did you put an orifice tube back in the system?

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BigDoe on Sat June 14, 2008 9:59 AM User is offline

Quote
Originally posted by: TRB
Would not be the first time something crawled into a line and plugged it. Did you put an orifice tube back in the system?

No i did not. Could you possibly tell me where i would find it on this car?

BigDoe on Sat June 14, 2008 3:27 PM User is offline

Oops i meant i did not replace the orifice tube. I just pulled it out and cleaned it. It had some gunk before the o-ring but the screens were pretty clear. The sensor is after the tube so the refrigerant must be getting past that in order for the compressor to kick in.

TRB on Sat June 14, 2008 4:34 PM User is offlineView users profile

Only thing i can suggest at this point is to break each component down to isolate it. Them blow nitrogen preferable through it checking for a restriction. You can also pinch off the rubber section of the suction line for a few seconds while the compressor is running. Watch your gauges and if it pulls into a vacuum you know the compressor is working. Only do this for a few seconds!!!!!!

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

BigDoe on Sat June 14, 2008 6:24 PM User is offline

I don't have access to nitrogen. I cracked the lines at several locations and took some electrical parts cleaner and sprayed in them. Then took compressed air and blew them out. I know this is not the propper method but just trying to make due with whats available.

I put it all nack together and its holding a vacuum. I went ahead and ordered a new accumulator for it and I am going to replace that before i charge it again.

BigDoe on Thu June 19, 2008 1:32 PM User is offline

I put a new accumulator on with 4 oz of PAG 150. I was able to get it to take some refrigerant, but the low and high side pressures are equal.

Do you think the compressor is not working? I can tell the clutch is engaging.

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