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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

AC tech's I need your help

  • Thread starter Thread starter harley02
  • Start date Start date Jun 5, 2005
H

harley02

New Member
Aug 29, 2004
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Tarpon Springs, FL
Jun 5, 2005
#1
  • Jun 5, 2005
  • #1
Story: Around town and w/the AC on or off the temp gauge NEVER goes above the O on the NORMAL gauge. Air blows cold. However, at highway speeds w/the air off the care runs at or near the same area. HOWEVER, as soon as I turn on the air (lets say between 70-85mph) the gauge immediately skyrockets to the A on the NORMAL gauge,,fan kicks on, and settles down.

I did get a free AC check and the main line that runs on the drivers side of the manifold does have a small AC oil leak and I was told that I am low on freon. (BTW do our cars use the 22 or R134 refrigerant??)

A home AC guy told me that if a car is low on freon that it makes the compressor work that much harder which in turn makes the car get warmer. True? Not true?

Now, I do have UD pullies on and am only bypassing the smog pump. I dont think it's a slippage issue at highway speeds. Could it be my radiator is not working as it should or is it the low freon issue. Anyone else w/these problems? Thank you.
 
W

wytstang

Mustang Master
Mar 14, 2004
4,988
4
78
Summerville,SC missing South Fl. weather :(
Jun 5, 2005
#2
  • Jun 5, 2005
  • #2
I believe we use the R12 freon unless it's been converted to R134. Low freon will keep the a/c compressor turning on/off constantly making the engine work harder. If the belt was slipping your volt gauge would drop as well I would think.
 

stprorolla49

Active Member
Oct 9, 2004
1,455
15
39
Fairfield, CT/North Jersey
Jun 5, 2005
#3
  • Jun 5, 2005
  • #3
wytstang said:
I believe we use the R12 freon unless it's been converted to R134. Low freon will keep the a/c compressor turning on/off constantly making the engine work harder. If the belt was slipping your volt gauge would drop as well I would think.
Click to expand...
wyt- its R134 cause it says it on my rad cover (that black plastic thing) and on a sticker some the hood, and on one of the a/c lines actually.......

harley-ive got that line for ya still.......
 
W

wytstang

Mustang Master
Mar 14, 2004
4,988
4
78
Summerville,SC missing South Fl. weather :(
Jun 5, 2005
#4
  • Jun 5, 2005
  • #4
Cool I had them back words thanks
 

CBZGT50

New Member
Apr 21, 2005
171
0
0
St Louis area
Jun 5, 2005
#5
  • Jun 5, 2005
  • #5
What is the part named that goes and turns the compressor on? I don't have 12 V at the compressor and it NEVER runs. The A/C ran last week until I fiddled under the dash, now it is broke and hot as ............

I fidled under the dash but I son't know what could be keeping it off, vacuum, fuse?
 

mo_dingo

20+ Year Stangneter
Aug 26, 2003
3,031
2
58
Tucson, AZ
Jun 5, 2005
#6
  • Jun 5, 2005
  • #6
CBZGT50 said:
What is the part named that goes and turns the compressor on? I don't have 12 V at the compressor and it NEVER runs. The A/C ran last week until I fiddled under the dash, now it is broke and hot as ............

I fidled under the dash but I son't know what could be keeping it off, vacuum, fuse?
Click to expand...

There is a pressure sensor on the accumulator. If it doesn't detect refridgerant then it won't let the compressor come on. If the sensor is bad, the compressor won't come on. If the switch inside the car is bad, it won't let the compressor turn on. Start with the sensor, and unplug it, and use a jumper wire and connect the two terminals on the wire plug. If the compressor turns on, the switch inside the car is good, and you are out of refridgerant or the pressure sensor is bad. Test the system for pressure.

If it still doesn't come on do a continuity test between the connector at the a/c and the connector at the pressure sensor. 1 wire should have continuity. If it does, your interior panel is bad or wiring to the pressure sensor.


Back on topic, check to see if your freon level is low. if it is, find/fix the leak and refill the system. Shoudl take care of teh problem.
Scott
 

DougNuts

Founding Member
Jul 11, 2000
2,596
0
47
Georgetown Ky
Jun 5, 2005
#7
  • Jun 5, 2005
  • #7
Just had to slip this in here: I'm looking for an A/C fill valve if anyone has one. It's the piece that screws in right by the dipstick handle.
 

urban96

bubb rubb says:"woo woooooo"
Founding Member
Sep 24, 2002
3,464
1
69
Syracuse, NY
Jun 5, 2005
#8
  • Jun 5, 2005
  • #8
you can pick up a whole refill kit from pepboys, autozone, advanced for pretty cheap
 

CBZGT50

New Member
Apr 21, 2005
171
0
0
St Louis area
Jun 6, 2005
#9
  • Jun 6, 2005
  • #9
Huh? Wtf?
 
H

harley02

New Member
Aug 29, 2004
110
0
0
Tarpon Springs, FL
Jun 6, 2005
#10
  • Jun 6, 2005
  • #10
Thnx everyone. I'll try fixing the leak, charging the system to capacity and see what happens.

Michael, the funds nor the wife wont let me spend the money at this time. If ya have another offer take it. Thnx for the offer tho.
 
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