1990 Ford Crown Victoria A/C 134a Pressure

NEWYORKER

MEMBER
1990 FORD CROWN VICTORIA
V8
2WD
AUTOMATIC
220,000 MILES

Hello,
I have a 1990 Ford Crown Victoria wagon that blew a seal in the a/c compressor. Bought new compressor, accumulator, orifice tube, new o-rings, added oil to components.
Checked for leaks with a compressor, ok; vacuumed system, and it seemed to hold the vacuum. I am in the process of charging with 134a, can anyone tell me what are the proper high and low pressures for this car?
Currently, I have the pressures at 20 psi on the low side, and 200 on the high side. Today's temperature was 77 degrees F. I am getting cool air but the compressor is still cycling on and off especially when I first start the car up.
Is this ok or should the compressor always run continuously?
Any replies would be appreciated.
Thank you

3 Replies

WRENCHTECH

MECHANIC
20,757 POSTS

How much refrigerant did you put into it?

Was this

answer

helpful?

Yes

No

Sunday, June 5th, 2011 AT 11:56 AM

NEWYORKER

MEMBER
2 POSTS

I put in approximately 24 oz. I recently found out that I should have about 36 oz. Is that about right? The compressor is cycling on and off. I will put more refrigerant in today. Do you know if the compressor should cycle or run continuously?
Thank you