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Doug Total posts: 804
Doug McKeown2001 Grand Prix GTP Joined: 19 Mar 2004 Location: Geneseo |
 Posted: Wed Jun 10, 2009 8:16 am Post subject: AC LOW CHARGE PROBLEM |
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Trying to recharge a GP that has such a low charge it won't turn the compressor on when the recharge bottle is hooked up. I know their is a fuse under the hood you can jump across 2 of the terminals to start compressor, but don't remeamber which fuse or terminals. Help anyone?
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2001 Silver GTP coup 11.880@116.17 Fun Driver
1998 SilverMyst GTP sedan 13.716 Sold
2010 Black Camaro Daily Driver
1969 Firebird convertible 455 FUN |
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| oppjd Total posts: 123
Mike1999 Grand Prix GTP Joined: 27 Sep 2004 Location: Rochester, NY |
| Posted: Fri Jun 12, 2009 9:19 pm Post subject: Re: AC LOW CHARGE PROBLEM |
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| Doug wrote: | | Trying to recharge a GP that has such a low charge it won't turn the compressor on when the recharge bottle is hooked up. I know their is a fuse under the hood you can jump across 2 of the terminals to start compressor, but don't remeamber which fuse or terminals. Help anyone? |
My 1999 Lumina 3.8L manual says: "If the clutch cycles off, you can pull the low-pressure cycling switch plug from the evaporator inlet line and attach a jumper wire across the terminals. This will keep the compressor on"
- Probably the same procedure for a Grand Prix 3.8. Also, you can try dumping freon into the high-side first then low side but you will need manifold or adapters. IF it is that low you probably have a leak somewhere so some UV dye should help.
_________________
1. 1999 Black GTP
- 13.53 @ 102.9 MPH
- DHP PCM / Pace Setter Headers / SLP Exhaust / 1.9 Rockers / 105# Springs / Custom FWI / 3.25\" Pully / No Cat / Drilled T-Stat / Different idler and tensioner pulleys for better S/C wrap / GMPP Suspension Upgrade
2. 1999 Chevrolet Lumina 9C3 - 16.11 @ 85
3. 2003 Kawasaki Ninja 900 - 11.166 @ 127.58 (Till I get a better launch)[img][/img]
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| Doug Total posts: 804
Doug McKeown2001 Grand Prix GTP Joined: 19 Mar 2004 Location: Geneseo |
| Posted: Mon Jun 15, 2009 6:43 am Post subject: |
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| Thanks Mike! |
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| mguzzo Total posts: 2863
Michael Guzzo1998 Grand Prix GTP Joined: 03 Oct 2003 Location: in front of you Age: 58 |
| Posted: Sun Jun 28, 2009 5:05 pm Post subject: |
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doug what did you end up doing?
there's no low pressure switch on the GP only high pressure. its a three prong switch, with 5V and ground from the PCM and signal back to the PCM. i don't know if 5V back to the PCM is too much.
i think i'm going to get a connector for the compressor that i can hook up with a button switch to the battery, to cycle the compressor while I fill.
_________________
1998 Silvermist GTP Coupe
Bone stock unicorn
1998 True Green Metallic GTP Coupe
Pullied, cammed, intercooled. With a kiddie seat. It once ran a 13 flat.
1998 True Green Metallic GTP Sedan (retired)
Stock: 14.33 @ 96.5
PB: 13.89 @ 101 mph |
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| mguzzo Total posts: 2863
Michael Guzzo1998 Grand Prix GTP Joined: 03 Oct 2003 Location: in front of you Age: 58 |
| Posted: Mon Jun 29, 2009 7:12 pm Post subject: |
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| OK, so I loaded about half a can in the low side, started the car and turned on the AC, the compressor clicked on after a couple seconds and cycled. I loaded the rest of the first can and then one more, keeping revs at about 2000 rpm and cycling the AC on and off. the compressor seemed to cycle and then cold air started blowing out! wahoo! I haven;t had AC in three years. just in time for dog days of summer. |
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