Automotive Air Conditioning Information Forum (Archives)

Provided by

We've updated our forums!
Click here to visit the new forum

Archive Home

Search Auto AC Forum Archives

Is it under charged?

BG1 on Tue October 26, 2010 6:28 PM User is offline

Year: 1976
Make: Pontiac
Model: Firebird
Engine Size: 455
Refrigerant Type: r134a
Ambient Temp: 82
Pressure Low: 40-42
Pressure High: 100-110

I was trying to put in the r134a and my digital scale stopped and left me no way to know for sure how much refrigerant I had in the system. The system calls for 52oz of r12 and I was going for about 75% of that amount of r134a and had about 30oz in when the scale quit, I added some more to see if I could get it to cool like it should but the best I could get was 48 degrees at the vent. Before I opened the system the high side pressure was running real high and the vent temps were not good so I flushed the system and changed the dryer and added the correct amount of oil and pulled a vacuum and this is where I am now. What is a good digital scale that can be used for this that will count down and not power off? I am using a digital scale for postal packages but it turns off every few minutes and that's a hassle.

Edited: Tue October 26, 2010 at 6:39 PM by BG1

TRB on Tue October 26, 2010 11:23 PM User is offlineView users profile

This is what I would suggest. But you might find cheaper options at Lowes.

Accu-Charge - Mastercool


When considering your next auto A/C purchase, please consider the site that supports you:

Chick on Wed October 27, 2010 7:53 AM User is offlineView users profile

Did you change and check the O tube? You can charge by feeling the inlet and outlet of the evp, should be the same temp, outlet slightly colder.... You high side is to low indicating low charge.. Tim's advice on that scale is a good idea too, it's what I use.. .. But there is no exact amount for retrofits..each car is different... so use the feel method and watch the high side doesn't go thru the roof..

Email: Chick


Freedoms just another word for nothing left to lose

Back to Automotive Air Conditioning Forum

We've updated our forums!
Click here to visit the new forum

Archive Home

Copyright © 2016 Arizona Mobile Air Inc.