Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

A/C compressor question

Thread Tools
 
Search this Thread
 
Old Jun 22, 2014 | 07:20 PM
  #1  
Hawkeye1980's Avatar
Thread Starter
Supreme Member
iTrader: (3)
 
Joined: Jul 2005
Posts: 1,062
Likes: 71
From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
A/C compressor question

Ok, beyond my renewed starting issues. The A/C compressor. Last year I said ah, its been since 1994 that i had A/C in this car. So I thought just charge it up and see. To my BIG surprise it WORKED. Compressor engaged and I had A/C? I could NOT believe it, but it was short lived, the system had leaks.

So today when I had it running, I charged it again after replacing all the o-rings. Well she charged up but the compressor will not engage. Its trying from what I can hear, but no go.

I am thinking the obvious but should I just replace the compressor? THanks.
Reply
Old Jun 22, 2014 | 07:55 PM
  #2  
paulo57509's Avatar
Supreme Member
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2000
Posts: 3,178
Likes: 48
From: Tracy, CA
Car: '87 IROC
Engine: LB9
Transmission: TH700R4
Re: A/C compressor question

Typically, if the system is low on refrigerant the compressor will not engage. This is to protect the compressor.

Unless you locate and repair all the leaks you're just wasting your time to continue to try and recharge it. The leaks won't fix themselves. Also, don't introduce any kind of stop leak into your system.
Reply
Old Jun 22, 2014 | 10:31 PM
  #3  
Hawkeye1980's Avatar
Thread Starter
Supreme Member
iTrader: (3)
 
Joined: Jul 2005
Posts: 1,062
Likes: 71
From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
Re: A/C compressor question

Originally Posted by paulo57509
Typically, if the system is low on refrigerant the compressor will not engage. This is to protect the compressor.

Unless you locate and repair all the leaks you're just wasting your time to continue to try and recharge it. The leaks won't fix themselves. Also, don't introduce any kind of stop leak into your system.
Well, like I said last year as a goof I charged the system. It was empty or not in use since 1994. And to my amazment it worked. So I replaced all the seals yesterday. Then charged it up again today. It sould like its trying to engage the compressor but only making some slight noise. Not the actual click you hear when it kicks in. My thinking is maybe it needs oil? or its just gone bad.
Reply
Old Jun 28, 2014 | 08:40 PM
  #4  
Hawkeye1980's Avatar
Thread Starter
Supreme Member
iTrader: (3)
 
Joined: Jul 2005
Posts: 1,062
Likes: 71
From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
Re: A/C compressor question

Well still not sure why the a/c compressor wont engage even with the system pressurized. Any help or thoughts on this? thanks.
Reply
Old Jun 29, 2014 | 11:15 AM
  #5  
Hawkeye1980's Avatar
Thread Starter
Supreme Member
iTrader: (3)
 
Joined: Jul 2005
Posts: 1,062
Likes: 71
From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
Re: A/C compressor question

I did some digging on this site on this issue. I just picked up a new pressure switch from Autozone. I tried the paper clip trick on wiring and the air compressor engages. Hoping this switch is the issue.
Reply
Old Jun 29, 2014 | 11:52 AM
  #6  
Hawkeye1980's Avatar
Thread Starter
Supreme Member
iTrader: (3)
 
Joined: Jul 2005
Posts: 1,062
Likes: 71
From: New York
Car: 1989 Firebird Formula 350
Engine: 5.7
Transmission: 700R4
Axle/Gears: Stock
Re: A/C compressor question

well, it was the switch. But I must have a heck fo a leak. I first started the car, then turn on the A/C. I had charged it 2 days ago. So used the paper clip and got the compressor running, the guage dropped to 0. So I charged it with what I had left in the can, almost got it to the green area, and it started to work. I pulled the paper clip and connected it to back to the new pressure switch. PERFECT. but not for long, pressure drops and the compressor stopped. Oh well, time for new parts.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Frozer!!!
Camaros for Sale
35
Jan 19, 2024 04:55 PM
zayne0
Camaros for Sale
0
Aug 24, 2015 07:22 PM
redmaroz
LTX and LSX
7
Aug 16, 2015 11:40 PM
Thaney9
Electronics
3
Aug 7, 2015 08:25 PM




All times are GMT -5. The time now is 10:01 AM.