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2003 galant ac low side going from 120 to zero only as I apply throttle to the engine


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Kendalloneal
New User

Jun 13, 2017, 10:10 PM

Post #1 of 4 (324 views)
post icon 2003 galant ac low side going from 120 to zero only as I apply throttle to the engine Sign In

Crazy guys or gals any help or advice would be great I have a 2003 galant I pulled a vacuum and after 45mins I decided it was time to start to charge the system i put the ac on max and hooked up my manifold gauges but my high side gauge is smashed (I dident pick up my tools before my wife left for the store I'll update with high side pressure once the new gauges come in on amazon) the compressor was clutch was not engaged when I started to add Freon it engaged everything looked normal until I turned off my blue knob the pressure was staying high like the compressor wasn't pumping then I pulled the throttle on the car and the low side started to decline ( it wasn't dropping fast it seemed to drop faster with the more I applied throttle but if I let off throttle it would climb back up slowly if I romped on the throttle it would drop to zero I haven't seen this happen before and what a awful time to not have high side pressure any advice


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jun 14, 2017, 2:03 AM

Post #2 of 4 (316 views)
Re: 2003 galant ac low side going from 120 to zero only as I apply throttle to the engine Sign In

Why did you need or think you needed to vacuum this system at all? That's going to matter. Did the vacuum hold at this age I'd want vacuum pump to achieve full vacuum, shut that off and hold for at least 30 minutes or it's just sucking in air into the system and all bets off.


You must fill to known specs. If without a means or understanding to charge a system plain don't and learn how. Just that if done wrong with a system that's perfect can cause you some serious damage you may not have had!


Link is locked up top on "Basic Charging Procedures" is expecting that you know system is ready to charge as best you can.
Hey - if you left a tool/gauges where they could be broken - it doesn't help so stop the show, disable a system where you were till you can proceed properly.


This much you must know or really should send the problem or just the charge out if you fixed something..........
http://autoforums.carjunky.com/..._A/C_SYSTEMS_P45460/


If that's confusing in any part to you, you have to learn how or get help,


T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 14, 2017, 4:45 AM

Post #3 of 4 (312 views)
Re: 2003 galant ac low side going from 120 to zero only as I apply throttle to the engine Sign In

You can't do this without a high side reading. Do you know exactly how much refrigerant you put in?

Get some new gauges and we'll try this again.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sidom
Veteran / Moderator
Sidom profile image

Jun 14, 2017, 10:52 AM

Post #4 of 4 (292 views)
Re: 2003 galant ac low side going from 120 to zero only as I apply throttle to the engine Sign In

What was the original problem you were having before you did the evac & recharge?


It would be very helpful to know how much refridgerant you used......Definitely gonna need both low & high side readings and ambient temp...






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