Help air conditioning experts

Presume you ran an evac pump for at least 1hr to purge any moisture!
Presume oil in system was to correct qty and spec!

 

Suck it down again and close system see it it holds vacuum for an hour or two

Those are very low pressures possibly a bad seal in the compressor unless its like 10 degrees outside where you are

 

Almost sounds like your spinning the compressor backwards. Weird. Would the expansion valve let the flow go that way? If I couldn't figure it out then I would take it off and spin it by hand to make certain I have the flow correct.

 

You may have nailed it, if its a rebuilt exchange they were made to spin clockwise or CCW

 

I re read your first post

Was the system wide open all these years, lines? The receiver dryer could be fried. This is somethign that needs to be sealed up even if off the car for a few days.
May have too much oil in the system.

Are you using R12?

 

He needs to be

 

A new drier was fitted.

 

Did the clutch on the a/c compressor actually 'kick in' BillyD?

 

Thanks mate, my first thoughts were a TX valve issue and I think I am correct.

It sounds like a stuck TX valve to me. This is very common in all cars with a/c that never get used.

If there was a blockage, the high side would have went up in pressure also.

This is what leads me to believe the TX is stuck in a certain position mate. If you can access the TX valve, give it few fairy taps with a small hammer or wrench. This might loosen it up and allow it to work properly. That or remove the gas from the system and replace it. It's your call.

*I had this same issue in my car around 10 years ago. The car sat for 12 months, started it up and the a/c was not working. Put some gauges on it and found the same problem, high low side/low high side. I gave the TX valve a few taps and the a/c started to work fine*

Give this a go and let us know what happens Billy.

 

Cool sounds like you did everything correct

Like Pap stated try that.
If that dont work suck the system down then try to run it by jumping power to the compressor to get it to run under vacuum that may free up anything thats sticking inside it. if that dont work may need to open it and look for a pinched gasket or O ring

 

I vote for bad compressor or bad expansion valve

 

These are the two parts typically changed in an auto A/C restoration

BillyD what have you done to this Fcar?!

 

If the lines are have crud or moisture this would be a problem. Have the lines been inspected? Dryer, condenser, compressor, any valves would need replaced first. A problem could push its way and cause a sudden rise in pressure. My half a half a cent. Love A/C talk. Vacuum for an hour and leave it overnight to check for any leaks. Not pulling complete vacuum and installing new dryer could compromise it's effectiveness.