Search found 1236 matches

by JohnHere
Sat Apr 27, 2024 11:46 am
Forum: Automotive Air Conditioning Forum
Topic: 98 Buick Park Ave AC troubles - Hi side won't build
Replies: 11
Views: 108

Re: 98 Buick Park Ave AC troubles - Hi side won't build

Thanks very much for this info. Next recharge attempt forthcoming... I started reading about the VD compressors on the MACS website. It was enlightening, realizing that even when the clutch is turning it is operating at a smaller capacity and increases accordingly. Right. Even though the clutch is ...
by JohnHere
Sat Apr 27, 2024 9:19 am
Forum: Automotive Air Conditioning Forum
Topic: 98 Buick Park Ave AC troubles - Hi side won't build
Replies: 11
Views: 108

Re: 98 Buick Park Ave AC troubles - Hi side won't build

Yes, hi side gained around 50 psi, max 60 or so, never exceeding the highest readings of the lo side. Cabin air never seemed to change temp throughout. Okay...you need to get the full, exact 32 ounces (net weight, not fluid ounces) of R-134a into the system before we can evaluate cooling performanc...
by JohnHere
Fri Apr 26, 2024 9:36 pm
Forum: Automotive Air Conditioning Forum
Topic: Getting power to the relay but nothing to the compressor
Replies: 4
Views: 49

Re: Getting power to the relay but nothing to the compressor

My first inclination is to recover/evacuate/recharge to get the correct amount of refrigerant into the system, and then see if the compressor runs normally. Even though the compressor engages when you jump it and the system blows cold, it could still be low on charge. The specifications that I have ...
by JohnHere
Fri Apr 26, 2024 9:04 pm
Forum: Automotive Air Conditioning Forum
Topic: 98 Buick Park Ave AC troubles - Hi side won't build
Replies: 11
Views: 108

Re: 98 Buick Park Ave AC troubles - Hi side won't build

Before we discuss further, let me ask these questions: After you installed the new Delphi compressor, did you attain a full system charge of 32 ounces, or only a partial charge? The reason I ask is that according to the Field Service Manual, your car has a variable-displacement compressor with a mec...
by JohnHere
Fri Apr 26, 2024 7:52 am
Forum: Automotive Air Conditioning Forum
Topic: Continued from my previous thread: Plans for 90 civic A/C rebuild with newer gen Sanden compressor - remaining questions
Replies: 22
Views: 2543

Re: Continued from my previous thread: Plans for 90 civic A/C rebuild with newer gen Sanden compressor - remaining quest

The cleaned-up end looks pretty good. But from what I can tell, it still shows some pitting and an indentation where the o-ring goes. I would replace the line if you can locate one. Nothing worse than having to repeat the job due to a questionable component that fails right after completion.
by JohnHere
Fri Apr 26, 2024 5:53 am
Forum: Automotive Air Conditioning Forum
Topic: Continued from my previous thread: Plans for 90 civic A/C rebuild with newer gen Sanden compressor - remaining questions
Replies: 22
Views: 2543

Re: Continued from my previous thread: Plans for 90 civic A/C rebuild with newer gen Sanden compressor - remaining quest

90efAACIF wrote: Wed Apr 24, 2024 10:43 am makes me wonder if there are scenarios where the refrigerant might start to condense in the suction line as it makes its way to the compressor suction port such as at an abrupt reduction in line diameter at fittings.
I doubt it.
by JohnHere
Fri Apr 26, 2024 5:43 am
Forum: Automotive Air Conditioning Forum
Topic: Getting power to the relay but nothing to the compressor
Replies: 4
Views: 49

Re: Getting power to the relay but nothing to the compressor

The system might be low on refrigerant, not unusual for a vehicle of that age. When you say the pressures are good, have you actually connected a Manifold Gauge Set to check them? Is the system all original, and has it ever been serviced?
by JohnHere
Thu Apr 25, 2024 10:54 pm
Forum: Automotive Air Conditioning Forum
Topic: 98 Buick Park Ave AC troubles - Hi side won't build
Replies: 11
Views: 108

Re: 98 Buick Park Ave AC troubles - Hi side won't build

I had the handwheel closed to hi side during charging, only was open for vacuum and leak tests. I would like to know more about liquid charging to the hi side. I have heard this can be a bad thing? Great that you had the high-side handwheel closed during charging. As for leak testing, one point tha...
by JohnHere
Thu Apr 25, 2024 7:14 am
Forum: Automotive Air Conditioning Forum
Topic: 98 Buick Park Ave AC troubles - Hi side won't build
Replies: 11
Views: 108

Re: 98 Buick Park Ave AC troubles - Hi side won't build

A few things come to mind. That high side handwheel on the Manifold Gauge Set (MGS) should be closed at ALL times (this is an important safety issue) except when evacuating a system or charging liquid into the high side with the engine off. You will still get a gauge reading on the high side with th...