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Old 04-25-2008, 05:25 PM   #1
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Default AC Recharge?

I know this must seem like an absurdly simple problem, but I've never had to do this before and I don't want to go plugging the connectors into the wrong thing. There are two AC lines with connectors on them, one up near the coolant recovery tank and the other down hear the coil pack. Which of these do I connect my pressure gauge/refrigerant boost into?

My A/C hasn't been very cold lately.
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Old 04-25-2008, 06:02 PM   #2
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I will suggest that you take it to your shop of choice( seems that you have a pretty good one ) and have them pump the system down and recharge... Its the best thing I have ever done... The AC in the 95 works like it did when I first got it...

Are you going to be using the AC Gages? Or will you be using a can with a gage?

In any event I believe that your low pressure port will be inline next to the strut tower.. The Low pressure and high pressure ports are different sizes...

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Old 04-25-2008, 06:12 PM   #3
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Thanks, that'* the one I thought it would be.

I'm using a separate gauge and filler. I couldn't find the combined gauge and filler (mounts on can) that I remembered seeing before.

I'll definitely look into a full drain and recharge though. I need to have my A/C working well by Sunday, got a semi-lengthy trip then so this may work good enough in the meantime.
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Old 04-25-2008, 06:32 PM   #4
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97 service manual states this is what the reading should be in PSI on the low side service port for this humidity and temp....

Temp 60-70F , Humidity less than 40% Low side should then be 23-31 psi

Temp 60-70F, Humidity greater than 40% Low side should then be 25-33 psi

Temp 80F, Humidity less than 40% Low side should then be 27-35 psi

Temp 80F, Humidity greater than 40% Low side should then be 29-37 psi

Temp 90F, Humidity less than 40% Low side should then be 34-42 psi

Temp 90F, Humidity greater than 40% Low side should then be 37-45 psi

Do give the system several minutes to run so that the pressures will be true so you will get a better reading.. and do not exceed the the pressures for your temp and humidity... Too much refrigerant can also kill the systems cooling ability..

Hope that will give you a general idea of where you need to be...

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Old 04-25-2008, 07:19 PM   #5
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Thanks for the info, the gauge I bought would have led me to somewhere closer to 40 psi instead of the 33 or so I was aiming for (75*, and raining). I ended up putting a whole can in, I think...hard to tell whether it'* empty or not though. Only raised the system up 5 psi to 30 but it held there as I tried to extract additional refrigerant from the can so I guess it'* empty. I guess I'll find out when I go to take it off, lol.

Either way, got in the car and noticed the difference immediately. Aside from the blinking ECC which causes the car to blow hot air periodically (turning the unit off and on again fixes this) the air was much colder. I may go buy another can just so I can bump it up the extra 3 psi but we'll see. For now, I'm well-cooled.

On the negative side, it would appear that I have a slow leak seeing as how I just recharged the system at the end of last summer. Oh well.
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