Another A/C thread

[grngt50]

Hey guys,

I really need help with recharging my a/c. I am completely new to a/c work so please be patient. I will try to describe what is happening the best I can, so here goes.......

Basically, I have nothing but hot air coming out of the vents when the a/c is on. I have one of those recharge kits with the gauges on it but it's empty (Got it from my neighbor) Anyway, with the a/c turned on full blast the compressor clutch does not engage. I am able to get the clutch to engage by jumping the LPS. With the clutch engaged, the pressure gauge shows the system is empty (I am checking this on the low pressure port by the intake). The can I have is pretty much empty, so I wasn't able to put much into the system. But the little I did put in, once disconnected from the service port started making a loud hissing noise and wouldn't stop until I replaced the dust cap. Is that normal, or did I damage the service port? Can someone PLEASE tell me how to charge the system given the facts stated above, cause I'm tired of driving in a friggin sauna!!

Thanks,
James
94 GT AODE Vert

 

[HISSIN50]

James, check out Justin's thread from yesterday or so. I relayed the service port part numbers (which came courtesy of another member) on Justin's thread.

Once you replace the ports, you will want to vac the system, ensure it holds vac, and recharge.

Good luck.

 

[grngt50]

thanks for the response and links Hissin, that's gonna save me a crap load of searching!

How do I vac the system to ensure it holds vacuum? Is there some special tool that I have to buy or are they available for rental? Also, when I recharge the system, I am assuming I'll need to jump the LPS again to introduce r134 into the system, correct? If so, how long should I leave the jumper wire in? If I get enough of the r134 into my a/c system shouldn't the clutch start engaging on its own again?

Thanks,
James

 

[HISSIN50]

You have a couple of options for vacuuming the system down. If you have a good sized air compressor (for your air tools, etc) you can use a pump that attaches to it. You need to pull almost 30" to boil out the moisture. Robinaire makes a really nice pump that can do this (it's about 50-60 bucks) - it's much more efficient than the cheapo (10 dollar) pumps. A 10 dollar pump *can* work if you are doing the vacuuming in triple digit ambient temps though. Get the Robinaire (or something even better) if you can.

Then you leave the pump hooked up and ensure it holds the vacuum. If the system won't hold a vac (general rule of thumb is 30 mins), then your refrigerant will leak out too.

An alternative is to install your new ports and have a shop vacuum the system. They can also recharge it or you can do it yourself if you have manifold gauges.

Good luck.

 

[grngt50]

thanks for the info..........I'll probably try this weekend and I'll let you know how it turns out

-James

 

[SeventyMach1]

I dunno if you went through my whole thread or not ... but JT did post the low side service port part # that you need in there. Also, O'reilly's keeps them in stock. At least mine does.


Maybe this is why mine is not cooling as great as it should. Maybe I need to have it vacuumed?

 

[grngt50]

SeventyMach1.......yes, I read through your thread as well and got the service port part #'s. Seems like a lot of people have issues with their a/c but never post their resolution, so your thread was definitely informative. Thanks for the help

-James
94 GT Vert Aode