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2000 civic

tps500 on Wed August 17, 2011 9:25 PM User is offline

Year: 2000
Make: Honda
Model: Civic
Engine Size: 1.6
Refrigerant Type: R134
Ambient Temp: 100
Pressure Low: 190
Pressure High: 375
Country of Origin: United States

My compressor was cycling on and off, almost shutting the car down, so I put the gages on it and found that both side were very high( 190 and 375 ). I changed the expansion valve,and dryer, blew air through the evaporator with nice clean oil coming out and i have the same results. I have no indication in the compressor, lines evaporator or dryer of and trash or anything but clean oil. Not sure what to do next.

mk378 on Wed August 17, 2011 11:16 PM User is offline

190 on the low side is not possible unless there is air in the system or you are measuring pressure improperly (valve wheels on the manifold must be CLOSED to take accurate pressure readings). Does the condenser fan work? On that model, the condenser fan is simply wired to run all the time the compressor is on.

JJM on Wed August 17, 2011 11:29 PM User is offline

I have 3 gauge sets... none of them go up to 190 PSI on the low side.

As MK378 noted, I don't see how this is possible.

Joe


When considering your next auto A/C purchase, please consider the site that supports you: www.ACKits.com


bohica2xo on Thu August 18, 2011 1:12 AM User is offline

Well I have a gauge set that insults me if I go past 120 psi on the low side...

With insane pressures like that I would look to see if the condensor fans are working at all.

B.

-------------------------
"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

TRB on Thu August 18, 2011 1:18 AM User is offlineView users profile

I bet it's 90 & 375.

-------------------------

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JJM on Thu August 18, 2011 11:49 AM User is offline

Hahaha! Let me guess... it calls you a "RETARD" like my Yellow Jacket set. I never really paid attention, but I noticed the tiny RETARD section goes from 120-350 PSI. That section is scaled about the same size as a 10 PSI bracket.

Now it has me wondering... is the RETARD section there to insult you, seeing that there's no way you should have more than 120 PSI on the low side other than maybe hooking your gauges up wrong, or is there some other reason? Anyone know why RETARD is there?

Joe

When considering your next auto A/C purchase, please consider the site that supports you: www.ACKits.com



tps500 on Thu August 18, 2011 6:18 PM User is offline

I am sorry guys, I was thinking to myself " wow that low side is almost 100" and by the time I got in here to write it up I had 190 in my head. It was infact, 90 on the low side. I replaced the condensor fan motor (intermittant) and charged the system with 21 oz of R134. Readings were 45 and 225 with ambient temp of 96. At the closest vent to the evaporator, the temp was 62. Went for a drive and the compressor started kicking on and off. Came home to put the guages on it and the readings were 70 and 350. Removed a littel freon with no change,then added a little freon and the low side went to 45 and the high to 275. Revved the engine to 2000 rpm and the low stayed pretty close to the same and the high went to 450 and the compreesor kicked on and off. the condensor fan ran the whole time. Let it idle and the pressures go to 45 and 300.

mk378 on Thu August 18, 2011 9:03 PM User is offline

Did you use a vacuum pump before charging? It's important to have no air in the lines, only refrigerant. Also the amount of oil is critical on a small system with a scroll compressor such as this one.

Edited: Thu August 18, 2011 at 9:04 PM by mk378

tps500 on Fri August 19, 2011 9:13 AM User is offline

Yes, I used the vacuum pump for 1 hour, with a pause to check for leaks, then added 22 oz of freon. The pressures were 45 and 225 at idle. Too much oil or air in the system?

TRB on Fri August 19, 2011 9:35 AM User is offlineView users profile

Make sure no hot water is bypassing the shut off valve.

-------------------------

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Contact: ACKits.com

bohica2xo on Fri August 19, 2011 3:05 PM User is offline

JJM:

The word "retard" indicates a mechanical device in the gauge that arrests the bourdon tube movement to prevent over travel in the gauge movement. Just in case the low side gauge is connected to the high side, since commercial systems use the same fitting for both sides of the system. It retards the needle rate beyond 120psi.

It is also what you used to call an apprentice that hooked up the gauge set backwards. Now it is grounds for a lawsuit.

B

-------------------------
"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

JJM on Fri August 19, 2011 10:02 PM User is offline

I kind of loosely figured it was something like that... but of course you knew the exact technical details. Thanks again!

Joe

When considering your next auto A/C purchase, please consider the site that supports you: www.ACKits.com


tps500 on Sat August 20, 2011 11:05 AM User is offline

Hot water bypassing the shutoff valve?? Is this for the heater core?

I am going to check that now, Thanks

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