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Old 04-28-2003, 06:30 PM   #1
SAND_MAN1
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Question A/C problem on my L

Yesterday morning with the help of my Pops, we added some R134a to my A/C and everything seemed to be fine. This morning on my commute to work I noticed a difference in my car, it felt like it was slowing down from time to time for no reason and my A/C would make this loud humming sound. I opened up my hood during lunch while the car was running and the A/C was on and noticed on the A/C compressor that it would start up and stop about 2-3 seconds after starting, it looked like if the belt was slipping as well. Never had this problem until today so I was wondering if anyone else has had this problem and if so what did you do? Maybe I put in too much R134a?

Help me out!

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Old 04-29-2003, 12:34 PM   #2
Brad Pittiful
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i think if you put to much oil in yer car its not good for the engine..maybe its the same for the refrigerant too
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Old 04-29-2003, 12:55 PM   #3
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Anyone know how I can get rid of some of the refrigerant?
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Old 04-29-2003, 01:14 PM   #4
ImprezaVA
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SAND_MAN1:
I think you’re fully capable of doing this procedure, but just to troubleshoot every possible facet, did you add the refrigerant to the "low-pressure side?" It would be the fitting closest to the battery, windshield washer fluid reservoir, or simply the fitting with the blue top with an "L" on it. On most cars the Low-pressure side has a blue cap while the High-pressure side has a red cap, but on my Subaru Impreza L both are baby blue. A normal R-134a charging hose will not fit the high pressure port, but it is easy to do this accidentally using a gauge manifold. Never turn the refrigerant container upside down while charging. This may force liquid refrigerant into the compressor and cause severe mechanical damage. If you are foolish enough to have tried this and survived, it is because enough refrigerant was able to evaporate before being compressed. Other than that, did you have the car started with the A/C on full blast while adding the R-134a?

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Anyone know how I can get rid of some of the refrigerant?
The only way I know of removing refrigerant is with a vacuum. If the refrigerant touches your skin it can cause severe frostbite from what I've heard.

-Charles-
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Old 04-29-2003, 01:57 PM   #5
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I had the car started with the A/C on and I did put in on the Low Pressure side. Maybe I put in too much? Last year I ran it all summer without ever putting any refrigerant in it so that's why I went ahead and put some more in it.

I think maybe it was to much that was added. It was a 14oz can that I added. I'm hoping that it'll clear itself up but it's only acting up while driving with the A/C on. It feels like the car is braking for about 2 seconds or so and then it keeps going and then it happens again.
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Old 04-29-2003, 03:11 PM   #6
ImprezaVA
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Interdynamics makes a cheap kit to re-charge your A/C and with that includes a pressure gauge. You get what you pay for, $30, but a least you'll be able to figure out if you added to much by testing the low-pressure side. The guage face is shaded with colors to indicate low, high, or normal pressure. Pretty straight forward and for $30 it's cheap.

Did you add any compressor oil? Its usually good to add 1-2 oz. of compressor oil also. They come in little pressurized cans that that cost about $8.

I'm not an expert on adding refrigerant or diagnosing a A/C system. If it was working without this problem before adding the refrigerant, then I would say out of a hunch that you probably added too much refrigerant. Try to search around for symptons of adding too much refrigerant and see what you can come up with.

-Charles-
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Old 04-30-2003, 12:49 PM   #7
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Yesterday after getting home from work I checked the pressure and it looked fine, after running the car in the driveway for a while the A/C starting acting up again, I let it run still, opened the door and the car was no longer putting out cold air with the A/C on. What my old man and myself did was release some pressure from the high pressure connection. I then started the car back up and ran it for a good while with the pressure gauge connected to the low pressure side and it never hit the yellow. The A/C put out some nice cold air.

The test was this morning on the way to work, I ran it with the A/C on and it did start acting up but nowhere near the way it did on the previous day. When I make it home today I'm going to release a little bit more and hopefully that'll relieve the problem. I should know better tonight if it does cause I'm driving to Dallas to watch the Mavericks knock the Trailblazers out of the playoffs and send them packing!
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Old 04-30-2003, 12:55 PM   #8
ImprezaVA
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As I mentioned earlier, did you turn the refrigerant container upside down while charging. This may force liquid refrigerant into the compressor and cause severe mechanical damage. Also, did you add any compressor oil?

-Charles-
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Old 04-30-2003, 01:25 PM   #9
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Quote:
Originally posted by ImprezaVA
As I mentioned earlier, did you turn the refrigerant container upside down while charging. This may force liquid refrigerant into the compressor and cause severe mechanical damage. Also, did you add any compressor oil?

-Charles-
The can I used contained compressor oil in it with the refrigerant mix, I didn't have the can turned upside down when adding to it, I had it at a 45 degree angle, I felt the can get cold as it released into the Low Pressure connection and gradually turned the can until it was emptied out. It was a 14oz can of which 2 oz of it was the compressor oil. If after releasing more pressure it continues to act up then I'll have to take it to a shop and have them check out the A/C system.
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Old 04-30-2003, 02:35 PM   #10
ImprezaVA
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I hope you get everything taken care of.

-Charles-
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