Recharged my Ranger's A/C, Have some Questions

[V8BoatBuilder]

Bough my 2000 Ranger with a 2.5 4cyl over the winter, and the A/C was non-functional. The compressor spun fine by hand. Fast forward to now, it's 75 degrees ambient and I've hooked up my manifold gauges.

Initial Pressures:
Static: 75psi
Low: 20psi
High: 100psi
Vent Temp: 75 deg

Ok, so I'm thinking she HAS refrigerant in there due to the static pressure, but most of it has escaped. Where, I do not know.

So I connect a can of R134 and begin to charge. Intake is super slow, until I put the can into a bucket of hot tap water. :smoke:

After 12oz added:
Low: 30psi
High: 175psi
Vent Temp: 50 deg.

Added a bit more...

After 15 oz added:
Low: 30psi
High 185psi
Vent Temp: 48 deg

That's where I left it. But can I improve cooling on this system?? The sticker under the hood says the truck will take 1lb, 14oz of R134, meaning I added half of rated capacity.

1) What's the likelyhood there is a bunch of air in the system?
2) What do people get for cooling? At idle, I'm now getting a 27 degree drop in temps. Is this all I can get?

When disconnecting the high-side hose, I heard a little fizzing from the valve. That might be where the leak is.
3) Can I replace the valve core with the system charged?

 

[Tbars4]

...I can't answer most of your questions but, most A/C systems (including household) put out 50* air +/-...and IIRC, it is possible to add too much freon which will cause problems to your sytem...

..This is why I don't mess with freon..

 

[96eb96]

Bough my 2000 Ranger with a 2.5 4cyl over the winter, and the A/C was non-functional. The compressor spun fine by hand. Fast forward to now, it's 75 degrees ambient and I've hooked up my manifold gauges.

Initial Pressures:
Static: 75psi
Low: 20psi
High: 100psi
Vent Temp: 75 deg

Ok, so I'm thinking she HAS refrigerant in there due to the static pressure, but most of it has escaped. Where, I do not know.

So I connect a can of R134 and begin to charge. Intake is super slow, until I put the can into a bucket of hot tap water. :smoke:

After 12oz added:
Low: 30psi
High: 175psi
Vent Temp: 50 deg.

Added a bit more...

After 15 oz added:
Low: 30psi
High 185psi
Vent Temp: 48 deg

That's where I left it. But can I improve cooling on this system?? The sticker under the hood says the truck will take 1lb, 14oz of R134, meaning I added half of rated capacity.

1) What's the likelyhood there is a bunch of air in the system?
2) What do people get for cooling? At idle, I'm now getting a 27 degree drop in temps. Is this all I can get?

When disconnecting the high-side hose, I heard a little fizzing from the valve. That might be where the leak is.
3) Can I replace the valve core with the system charged?

With all due respect to this forum, Ackits.com forum has great people (techs) who can answer specific A/C questions. They work in the field and are specialists.

A pound of freon is 12oz, so be careful. Your system takes 26 oz.

Remember vent temps have to be taken at 1500RPM after the car is warmed up.



This is what they will probably tell you there...

Shoot some dye (or it already may be in there) and see if the valve is leaking with a UV lamp or freon meter.

Evacuate the system

Pull a deep vacuum, there are pumps that can do this for $100 bucks. See if you can hold vac for 15 min. Pull the Vac for another hour.

Charge system with correct charge, I use a diet scale with the cans. Tare the weight before and see how much is going in. An extra oz or two is ok because of the hoses

Add 2oz of oil for the leak.

The guys there will know specifically about that high side fitting.