98 GT A/C not working (Read more please)

Chrismac7261

New Member
Jun 3, 2018
1
0
1
22
Atascadero California
In my 98 GT, the ac isn’t working almost at all. I checked the pressure on the low pressure refrigerant pipe, and the pressure keeps fluctuating with the car on. I found that this is happening because the compresser keeps on turning on then off rhythmically in sync with the engine reving higher then lower. Would a recharge fix this or is the ac clutch bad, or is it something worse? My car is a manual if that makes any difference.
 
  • Sponsors(?)


RaggedGT

check back later..
Mod Dude
Jul 20, 2014
4,673
3,093
193
35
Taylorsville ky
www.stangnet.com
Welcome to Stangnet :SN:
On this site there are many how to’s for checking/servicing your AC on your own.
As far as the pressure fluctuating and the Rpm’s raising and lowering when the compressor runs-is normal.
If the compressor is cycling very fast-It’s likely a low charge.
But my best recommendation for you -is to pony up the money to a reputable service shop to evacuate-vacuum and charge your AC system.

If you really want to try it on your own,search for @jrichker s ac how to . It’s written for a fox system,but most of the info translates over.
Hope this helps :nice:
 

jrichker

StangNet's favorite TOOL
SN Certified Technician
Mar 10, 2000
27,429
2,866
234
74
Dublin GA
lowendmac.com
In my 98 GT, the ac isn’t working almost at all. I checked the pressure on the low pressure refrigerant pipe, and the pressure keeps fluctuating with the car on. I found that this is happening because the compresser keeps on turning on then off rhythmically in sync with the engine reving higher then lower. Would a recharge fix this or is the ac clutch bad, or is it something worse? My car is a manual if that makes any difference.
You have a low refrigerant charge; the low side pressure drops and that causes the compressor to shut off. Add about 12-14 oz of R134 refrigerant and that will probably fix your problem unless there is a leak.
 
Thread starter Similar threads Forum Replies Date
G Engine Temperature reading is not working properly Fox 5.0 Mustang Tech 16
Noobz347 Administrative HOW THIS FORUM WORKS - Read Me First Regional Forums and Event Information 3
P Brake lights not working, please read Fox 5.0 Mustang Tech 3
TX MACH 1 Will an old AutoTap work for reading codes? 1994 - 1995 Specific Tech 2
Mustangless walmart code read, can't get working 1994 - 1995 Specific Tech 5
Miklowcic I'm becoming quite the mechanic! READ THIS IF YOUR AFRAID TO DO ANY WORK YOURSELF! SVT Tech Forum 3
M help with belt please read asap working on it now Fox 5.0 Mustang Tech 15
E Electrical Power locks not working Fox 5.0 Mustang Tech 13
R Signal lights suddenly stop working Fox 5.0 Mustang Tech 19
B electric seat in 2002 Mustang wont work 1996 - 2004 SN95 Mustang -General/Talk- 5
N 67 mustang dash lights not working 1965 - 1973 Classic Mustangs -General/Talk- 0
G Front turn signals don’t work Fox 5.0 Mustang Tech 10
O 94 Cobra driver's power seat /AUX / lumbar stopped working 1994 - 1995 Specific Tech 2
B For Sale 99 - 04 Mustang H-pipe with working Cats for sale Other Classifieds 0
M Replaced abs module, working good now 1996 - 2004 SN95 Mustang -General/Talk- 0
J Body Work in OC Services - Tuning, Welding, Mechanic, Body Work... 0
J Paint and Body Paint and body work 1965 - 1973 Classic Mustangs -General/Talk- 7
7991LXnSHO Interior and Upholstery How are the new cup holder consoles working? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 29
Mixveez Interior and Upholstery Dome and map light dont work Fox 5.0 Mustang Tech 9
Jetzv8 2014 Mustang radio not working. NEED HELP Mustang Sound & Shine All 0
G RPM gauge not working Fox 5.0 Mustang Tech 1
M Turn signals and wipers not working The Welcome Wagon 1
Ultra90GT For Sale The Nitrous Works TNW efi plate Engine and Power Adder 3
R 1995 Mustang power window does not work. 1996 - 2004 SN95 Mustang -General/Talk- 0
S Fuel Explorer Throttle Body.....What Years Will Work On Foxbody Fox 5.0 Mustang Tech 5
M Windshield wipers only work on high. Washer fluid not working. 2010 - 2014 Specific Tech 0
M 1994 Mustang COBRA - speedometer not working 1994 - 1995 Specific Tech 11
K Traction Control Wont work ( I stall burning out ): ) 2005 - 2014 S-197 Mustang -General/Talk- 2
L Working Roush Hood 2005 - 2014 S-197 Mustang -General/Talk- 7
0 Will these Explorer injectors work on my 01? 1996 - 2004 SN95 Mustang -General/Talk- 8
J Fuel Code 452. Fuel pump not working. Help 1994 - 1995 Specific Tech 5
T 96 mustangt will a 2003 cobra guage cluster work in a 96 gt SN95 4.6L Mustang Tech 3
79pace 2016 Radio Quit Working 2015+ (S550) Mustang -General/Talk 2
F Speedo not working 1996 - 2004 SN95 Mustang -General/Talk- 0
S Turn signals on a 68 coup no work but flashers do 1965 - 1973 Classic Mustangs -General/Talk- 0
0 Brake lights aren’t working 1996 - 2004 SN95 Mustang -General/Talk- 3
9 97 GT Cooling Fan Not Working SN95 4.6L Mustang Tech 2
S Electrical Horn keeps blowing fuse and radio not working Fox 5.0 Mustang Tech 2
S Horn doesn't work- ground issue on horn button wiring. Fox 5.0 Mustang Tech 9
Tavis 89 2.3L radiator fan possibly not working 2.3L (N/A & Turbo) Tech 8
D Key fob doesn't work for anything 2015+ Specific Tech 0
derek2079 Instrument cluster lights not working 1965 - 1973 Classic Mustangs -General/Talk- 7
91GTstroked Fuel Fuel gauge not working. Fox 5.0 Mustang Tech 3
M Brake lights don’t work SN95 4.6L Mustang Tech 3
James V Will SN95 TPS work with Fox ECU? Fox 5.0 Mustang Tech 0
G Electrical Wipers not working Fox 5.0 Mustang Tech 3
C Gauges on 2000 gt slow to work after starting 1996 - 2004 SN95 Mustang -General/Talk- 6
F Paint and Body Scott Rod Fab Engine Panels 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 9
L New Years Day working on the 83 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
J License plate light not working 1965 - 1973 Classic Mustangs -General/Talk- 0
Similar threads