Topic: AC question (Read 10039 times)

Joseph Davis · « **on:** June 13, 2009, 07:08:48 PM »

So I'm trying to charge the AC on mom's 1996 Honda Accord, and it won't take any refrigerant. It's been idling with the compressor jumped for almost two hours, has maybe taken 1/5th of a 12 oz can. Low side is 70-80 psi with valve open and 8-12 psi closed (system actual), and high side is 100-140 psi. Blows hot air, no surprise it's got no refrigerant.

Anybody have a fucking clue?

Ntrain2k · « **Reply #1 on:** June 13, 2009, 07:11:26 PM »

You have access to a vacuum pump?

I've never had good luck trying to just add some. Throw a vacuum on it, then let it draw the freon in.

Should be gold.

Conceptz-X · « **Reply #2 on:** June 13, 2009, 07:12:23 PM »

Sounds like your connector is just barely depressing the shrader valve, try pushing on it, sometimes it will work

Joseph Davis · « **Reply #3 on:** June 13, 2009, 07:20:52 PM »

Ntrain, it's some wierd unit that uses shop air to create a venturi effect. I ran it for 15 minutes, would read 20 inches but as soon as I closed the lowside valve on the gauges it'd drop to 10 inches and sit there.

Concepts: you're still black.

Conceptz-X · « **Reply #4 on:** June 13, 2009, 07:34:27 PM »

Had it happen before, that's why I said it

Conceptz-X · « **Reply #5 on:** June 13, 2009, 08:47:15 PM »

JD, check your PM's

snm95ls · « **Reply #6 on:** June 14, 2009, 02:43:54 AM »

Does it hold a steady 10" of Hg when close the high and low valves on the manifold? I have on of those venturi vacuum pumps and that little fucker will pull a well sealed system down to 25" to 30" of Hg, and closing the valves on the gauge manifold usually nets about the same.

I am assuming it is a TXV system like most Honda vehicles and not CCOT.

With that high of a low side pressure and the low of a high side pressure, either the TXV is stuck open or the compressor is weak.

Just my semi educated guess from what I remember.

I ASSUME that the condenser fan in operating properly even though I doubt the pressures would be what they even if it wasn't.

EDIT: dammit. Reading owns me.

Are you running the RPMs up when filling? Without a pump or a good vacuum to begin with, filing with cans is a bitch sometimes.

The low side pressure with the fill valve open is about right.

Conceptz-X · « **Reply #7 on:** June 14, 2009, 09:20:32 AM »

Quote from: Joseph Davis on June 13, 2009, 07:08:48 PM

Low side is 70-80 psi with valve open and 8-12 psi closed (system actual)

This means something is wrong with your low side hose, shrader valve, or connector. low side pressure on a full system should be in the 40-50PSI range at idle.

turbohf · « **Reply #8 on:** June 14, 2009, 05:08:30 PM »

i had the guys at work help me with my AC yesterday...

they put a vacuum on it, for a long ass time... wanted it to HOLD 30inchs. mine kept pulling 30, then going back down to like 15-20 (and holding). so we shot some 134 into it with some leak dye, no leaks, but the pressures where too high. said it was most likely cuz there was moisture or shit in the system. so they made me replace the receiver dryer. then it vacuumed out for 30-45mins, held 30in, and charged up just fine, blows cold... just need another fan so it doesnt overhead at a stop....

Conceptz-X · « **Reply #9 on:** June 14, 2009, 05:53:24 PM »

his pressures were consistent with a undercharged system. The drier will not make a system not hold a vacuum.

Joseph Davis · « **Reply #10 on:** June 14, 2009, 08:44:46 PM »

Concepts is the only person here who knows shit about AC.

Conceptz-X · « **Reply #11 on:** June 14, 2009, 08:51:50 PM »

sad isnt it? Call me nog, I'll help ya out and not be retarded like catsfool

snm95ls · « **Reply #12 on:** June 14, 2009, 09:25:50 PM »

BenDover · « **Reply #13 on:** June 15, 2009, 01:48:26 AM »

Expansion valve/Orifice tube or Receiver Dryer

Zarcorp · « **Reply #14 on:** June 15, 2009, 02:30:12 AM »

Lol pv=nrt ya'll.

crttaz · « **Reply #15 on:** June 15, 2009, 02:48:21 AM »

Quote from: Joseph Davis on June 14, 2009, 08:44:46 PM

Concepts is the only person here who knows shit about AC.

Not really. I see your trying some halfass setup trying to charge a system without evac. to get the moisture out and such. Just because I don't chime in, doesn't mean I don't know shit.

Sorta like and all the bullshit tuning questions.....well my bald son, you're on the other side of the cue ball

Zarcorp · « **Reply #16 on:** June 15, 2009, 02:55:32 AM »

Did somebody shine the F-body light into the sky?

Joseph Davis · « **Reply #17 on:** June 15, 2009, 03:37:36 AM »

Quote from: crttaz on June 15, 2009, 02:48:21 AM

Quote from: Joseph Davis on June 14, 2009, 08:44:46 PM
Concepts is the only person here who knows shit about AC.

Not really. I see your trying some halfass setup trying to charge a system without evac. to get the moisture out and such.

First, it's not a halfassed setup.

Second, you can't get moisture out by drawing a vacuum on the system. You might get some moist air out, but if the filter-drier is saturated good luck boiling it all out or something. I just bake them at 200 degrees for an hour, dry.

Third, Concepts was the only person here who knew shit.

Zarcorp · « **Reply #18 on:** June 15, 2009, 03:42:55 AM »

Expansion valve/drier set ups are gay.

That is all.

Conceptz-X · « **Reply #19 on:** June 15, 2009, 12:32:42 PM »

TXVs work on temp, JDs pressures were due to an undercharged system. Moisture would not present a problem untill the system is functional and charged

Joseph Davis · « **Reply #20 on:** June 15, 2009, 02:21:44 PM »

No, my problem was due to a schrader valve not fully depressed.

Maybe you don't know as much as I thought?

Zarcorp · « **Reply #21 on:** June 15, 2009, 05:11:10 PM »

I know how Honda designs their a/c, JD said something about moisture in the drier.

Filter elements in Chrysler bullshit expansion valve set ups are homo as homo can be.

The gaysex.

Conceptz-X · « **Reply #22 on:** June 15, 2009, 05:23:11 PM »

Well, some TXVs use a pressure reference as well as temp. Or completely pressure

I told you your problem right off, but either you testing people or did not believe me
Either way I don't mind lending a hand

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Author Topic: AC question (Read 10039 times)