1998 Taurus - 12 valve OHV AC low side is low, high side is low - Taurus Car Club of America : Ford Taurus Forum
 
LinkBack Thread Tools
post #1 of 3 (permalink) Old 06-06-2015, 03:18 PM Thread Starter
Junior Member
 
Join Date: Apr 2011
Chapter: Northeast
Posts: 29
Rep Power: 0
 
Trader Score: 0 reviews
1998 Taurus - 12 valve OHV AC low side is low, high side is low

Last September, I knew the high side service port was leaking. I could actually see the R134 bubbling in it. However, I was able to screw the plastic cap on and make it through September and October.

Fast forward to now. Both the low side and high side were coming back at zero psi. So, I replaced the low side and high side service ports, pulled a vacuum for an hour, and then it held vacuum for an hour. Figured everything was good in the world so I went ahead and put freon in it. Thing is, after 34 oz. of freon, the low side gauge continued to show 20 psi and the high side gauge continued to show 150 psi even though more freon was going into the system.

Added the freon with the vehicle running and the AC on cold and full blower. The AC clutch was not coming on initially, as expected. As I put more and more freon in, the clutch cycled longer and longer until it stopped cutting off. It stopped cutting off after putting 24 oz. of freon in the vehicle. Thing is, I added another 12 oz. and the low side remained at 20 psi and the high side at 150 psi the entire time. I could not get the low side into the 35-45 psi range as recommended for an ambient temp of 80 degrees.

The AC is blowing extremely cold right now, but I know something is not right.

Anybody know what is going on?
fabsroman is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 06-07-2015, 06:01 AM
wjc
Devoted Member
 
wjc's Avatar
 
Join Date: Sep 2008
Posts: 1,365
Rep Power: 26
 
Trader Score: 0 reviews
Borrow another set of gauges. At 20 PSI the low side switch would be cycling rapidly, if it even allowed the clutch to engage at all.

"Spare the duct tape, spoil the job."
wjc is offline  
post #3 of 3 (permalink) Old 06-07-2015, 09:31 AM
Devoted Member
 
Join Date: Jun 2004
Location: Omaha, nebraska
Chapter: Midwest
Posts: 1,940
Rep Power: 29
 
Trader Score: 0 reviews
Quote:
Originally Posted by fabsroman View Post
Last September, I knew the high side service port was leaking. I could actually see the R134 bubbling in it. However, I was able to screw the plastic cap on and make it through September and October.

Fast forward to now. Both the low side and high side were coming back at zero psi. So, I replaced the low side and high side service ports, pulled a vacuum for an hour, and then it held vacuum for an hour. Figured everything was good in the world so I went ahead and put freon in it. Thing is, after 34 oz. of freon, the low side gauge continued to show 20 psi and the high side gauge continued to show 150 psi even though more freon was going into the system.

Added the freon with the vehicle running and the AC on cold and full blower. The AC clutch was not coming on initially, as expected. As I put more and more freon in, the clutch cycled longer and longer until it stopped cutting off. It stopped cutting off after putting 24 oz. of freon in the vehicle. Thing is, I added another 12 oz. and the low side remained at 20 psi and the high side at 150 psi the entire time. I could not get the low side into the 35-45 psi range as recommended for an ambient temp of 80 degrees.

The AC is blowing extremely cold right now, but I know something is not right.

Anybody know what is going on?
As a matter of principle, i always add a can of UV dye to a refill so i can
see where its leaking (if it still is). I assume you changed all the O rings
you could get too when you did the refill?

One other thing to do that rarely gets done, is to clean out the condenser.
What i have done is to remove the lower cover between the radiator
and the condenser and shoot water up the gap and flush out the crud.

My harbor freight gages have served me well, but there NOT pro quality.
Probably around $50 with a coupon or so on sale.

http://www.harborfreight.com/quickvi...index/id/2463/

My last gen three repair was the change out the ac clutch pulley on
the car without degassing the system. That was a lot of fun.

Bob Urz 1989 Vulcan wagon (wife crashed) 1990 Vulcan sedan (sold running) 1993 Vulcan sedan (wife crashed) 1993 Vulcan wagon (beat up like Battlestar Galactica, drove to junkyard on a sad day) 1997 Vulcan sedan (down with multiple coolant leaks), 1998 Vulcan sedan (rescued from being junked twice with broken brake lines and bad rack, currently resurrected)

If Spock drove a Taurus it would be a Vulcan

Last edited by soundu; 06-07-2015 at 12:05 PM.
soundu is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Taurus Car Club of America : Ford Taurus Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
1998 Taurus SE Comfort Carlsonnr Introduction Forum 14 06-23-2015 05:22 PM
My98STL's 1998 Ford Taurus SE (Bessie) My98STL Taurus and Sable Project Log 35 11-01-2014 09:29 AM
99 taurus 24 valve dohc running ruff when hot wjdc00 Maintenance and Repair 5 07-14-2014 12:07 AM
Impossible to connect (ac manifold gauge) to low side port (2004 Taurus) TheEgg Maintenance and Repair 3 07-10-2014 08:33 PM
Power Steering Pump Replacement + High Pressure Line Monsoon Suspension, Handling and Brakes 0 05-04-2013 08:44 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome