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My parent's van doesnt blow cold

pippo on Thu May 06, 2010 7:35 PM User is offline

Hi again, people. It is a 95 Voyager, 3.3L. Just came back from their house to check it out: low side pressure goes from 10 then climbs to 60 when at that time the comp kicks on. Then, pressure drops to 10 again, and repeats. High side stays always at 100. Now sure what this means.

Also, when I connected the fitting to the high valve, then removed, I hear a hisssssssss, so I placed finger on it and felt some gas escaping. Looke dinside and noticed some strange type of black "ballish" thing. Beats me, guys. I did immediately cap it though, with the plastic cap and it appeared to stop. Does this need a new valve cuz of this??

Thanks!!

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mk378 on Thu May 06, 2010 8:09 PM User is offline

It should be a TXV system, not supposed to cycle like that. How rapid is the cycling? In any case it is most likely undercharged, need to evacuate and charge by weight to check further. The ball type ports can be replaced by unscrewing the whole port from the line.

pippo on Thu May 06, 2010 8:45 PM User is offline

Hmmm, I recall it would cycle for about 7-8 seconds then cut out. then start after needle drops to 10psi, say, 6 seconds. Since you say to evacuate, should we presume there is zero refrigerant left in it?

Thaks!

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mk378 on Thu May 06, 2010 9:00 PM User is offline

There is not much, if the high side really doesn't rise at all.

pippo on Fri May 07, 2010 10:06 AM User is offline

Quote
Originally posted by: mk378
It should be a TXV system, not supposed to cycle like that. How rapid is the cycling? In any case it is most likely undercharged, need to evacuate and charge by weight to check further. The ball type ports can be replaced by unscrewing the whole port from the line.

OK...I will search locally for one of these today. Do these "ball type ports" go bad or could I have messed it up whilst I clamped the quick release fitting on it? Just wondering. Thanks, MK!!

Pip

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pippo on Mon May 10, 2010 8:26 AM User is offline

OK, in planning this, anyone have a chart/manual handy the specifies the amount of charge of R134a for that van? I heard it depends if it is a single or dual (rear ac) system.........Gees, wonder if my mother knows that..LOL. I'll have to go there again, if so, to inspect.....

Thanks!

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Cussboy on Mon May 10, 2010 9:35 AM User is offline

http://www.autoacforum.com/speclisting.pdf

http://napabeltshose.com/news/index.cfm?location_id=1078&id=1517&show=newsitem

Edited: Mon May 10, 2010 at 9:37 AM by Cussboy

pippo on Mon May 10, 2010 6:32 PM User is offline

Thanks, Boy!

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pippo on Tue May 11, 2010 4:06 PM User is offline

OK, when you set up to evacuate, do you connect just one port to vac gauge? And does it matter if you vac from low or high port??

Thanks!!

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pippo on Tue May 11, 2010 5:27 PM User is offline

OK, found it on this site.....(Thanks, TRB...very well explained).

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pippo on Tue May 11, 2010 5:46 PM User is offline

Im stuck, guys! I followed those procedures but I think the comp will not cycle, so How do I do this:

In some cases if the compressor clutch has not engaged you may need to by pass the low pressure cut out/cycling switch

So, how do you bypass the switch? Heeeeeeeelp!!!!!!!! (I got a can of freon opened, and all evacuated.........)

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mk378 on Tue May 11, 2010 6:08 PM User is offline

Charge with the engine off until it won't take any more. It goes fastest to do it as liquid by holding the can(s) upside down. Then you should have enough pressure to close the switch.

pippo on Tue May 11, 2010 6:17 PM User is offline

Thanks, MK. Ill try it...........

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pippo on Tue May 11, 2010 7:00 PM User is offline

OK, got it in eventually. Next time, Ill remember that tip, MK. But man, not to happy with my results....after 4 cans of R134a, vent is 66 F, blower area is 84F. Thats only 18 deg cooling. I dunno, guess thats all the car is capeable of, huh?

Well, gonna have to drive it back to parent's house...maybe Ill check temps again as I travel at say, 45mph. Will that make a difference?

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pippo on Tue May 11, 2010 7:49 PM User is offline

Yahooooo!! aafter a few miles, and going 45mph, temps are : vent: 50F, blower: 82F. 32 deg F difference.......yahoooooooooo!

Thaks, MK, (and others here , of course!) Mother is happy too......

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pippo on Thu May 13, 2010 5:34 PM User is offline

OK.......got the ac working fine. BUT just realized the rear section does not blow cold. What does that mean, that the rear evaporator is bad/clogged?

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pippo on Fri May 14, 2010 4:59 PM User is offline

Quote
Originally posted by: pippo
OK.......got the ac working fine. BUT just realized the rear section does not blow cold. What does that mean, that the rear evaporator is bad/clogged?

Hmmm, I know SOME one has to know this here, I know its Friday night, guys...........Should I give up on this rear ac?

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