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Plese help me

ehrlich on Fri March 28, 2008 7:37 PM User is offline

Year: 95
Make: dodge neon
Engine Size: 2.0
Refrigerant Type: 134a
Ambient Temp: 82
Pressure Low: 0
Pressure High: 0
Country of Origin: United States

Hi my car have no refrigerant in it . I have a 0 reading on both sides of the ac system. I put 1oz of uv dye in it and tried to get 1 can of 134a in the ac system on the low side valve . It just not letting the refrigant in.....The car is started and the compressor is cycling on and off quickly but the can is not emptying in. It is still the same weighty as if it was not even connected. I checked the connection and it is good . I was told to pull low pressure cycling switch and jump it with a wire. But where is that switch ? Can any one help me please

Chick on Fri March 28, 2008 7:43 PM User is offlineView users profile

You need to pull a deep vacuum and charge into the vacuum. Follow Vac/charge procedures and fully charge the system to properly diagnose it. You will need both high and low pressures once you get the full charge in also..

Here are some DIY'er starter kits if you want to do your own AC work, anything less than gages and vacuum pump and you will risk killing the compressor and a lot more...

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

ehrlich on Fri March 28, 2008 8:17 PM User is offline

Thank you for the quick response. I do have access to a vacuum pump and i have my own gauges. Hey i just read the instructions on how to Vac/charge procedures. I know I have a big leak that why i pour 1 oz of uv dye into the low side valve by removing the the valve cores and pouring the dye in and then replacing the vale core back in . But getting a can of 134a is a bit challenging for me . Can you please explain how i find the leak using the uv dye .

Chick on Fri March 28, 2008 8:36 PM User is offlineView users profile

The dye has to circulate with the oil and refrigerant, that is why you need to pull a vacuum and recharge, while the system is running, the dye will find it's way out of the leak, and you'll see it with a UV light, or by eye if large enough...But the system must be charged and running for dye to work, otherwise you need an electronic leak detector. Did you do any work to the system before that may have blown the pressure relief valve??

BTW the vacuum will pull the refrigerant into the system allowing it to run and pull it all in....

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

Edited: Fri March 28, 2008 at 8:37 PM by Chick

ehrlich on Fri March 28, 2008 9:04 PM User is offline

Thank you for your time to explain how to find the leak and the produce. No, i haven't done any work on my ac until today so i don't know if i have blown the pressure relief valve. I was involved in a fender bender and had damaged my front bumper in late november last year . didn't think of the ac system then because the weather was nice and cold . But i think my ac condenser might have got quite a bang from that accident thats why i tried to do the uv lead test today . I will try again tomorrow because it late here and i will let you all know how far i have reach in solving my ac problems . And once again thank you Chick for being so informative and helpful in solving my ac problems. have a wonderful night

Chick on Fri March 28, 2008 9:36 PM User is offlineView users profile

Do a visual inspection of the condenser, lines and compressor. Look for oily spots that dirt is sticking to. If you had an accident, the condenser may have been damaged, when charging pay particular attention to any areas with oily residue..Hope this helps..

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

iceman2555 on Sat March 29, 2008 10:06 AM User is offlineView users profile

1 oz of dye is too much for this system. Excessive dye may contribute to compressor failures.
1/4 oz is sufficient for most all automotive A/C systems.
Just a bit of info.



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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

ehrlich on Sat March 29, 2008 11:07 AM User is offline

Hi there, will the vacuuming process take out the excess dye out of the ac system ?

mk378 on Sat March 29, 2008 12:10 PM User is offline

No, you'd have to flush it out. At least remove the low side line and compressor from the car and flush it with new oil that should get most of the excess dye out. I doubt the dye moved very far without a charge in it.

But first just pull a vacuum and see if it holds, there must be a big leak somewhere for example crash damage to the condenser.

After a system has been sitting open with zero pressure, the drier will be expended and needs to be replaced.

You may be having some problem with the valves and fittings when you tried to charge because it should always charge up to can pressure (50 - 90 psi) even without the compressor running. Do not jump the pressure switch to charge, it is unnecessary and risks compressor damage from running without refrigerant.

TRB on Sat March 29, 2008 12:54 PM User is offlineView users profile

Along with what others have mentioned. It would be wise to read what Karl from Hecat suggests when it comes to flushing a system.

Flush Procedure

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

ehrlich on Sat March 29, 2008 2:38 PM User is offline

Thank you all for the great help but i have a few more questions . What is the ideal reading on the gauges for the low and high side with the compressor on/ off for the dodge neon .

TRB on Sat March 29, 2008 2:44 PM User is offlineView users profile

A/C SYSTEM SPECIFICATIONS -1995 Dodge Neon

Compressor Type Nippondenso 10PA17 10-Cyl.
Compressor Belt Tension (1)
New 135 Lbs. (61 kg)
Used 100 Lbs. (45 kg)
System Oil Capacity (2) 4.8 ozs.
Refrigerant (R-134a) Capacity 29.0 ozs.
System Operating Pressures (3)
High Side 220-330 psi (15.5-23.2
kg/cm2 )
Low Side 17-32 psi (1.2-2.2 kg/cm2 )
(3) With ambient temperature at 80°F (27°C).


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

ehrlich on Tue April 01, 2008 7:23 PM User is offline

hi everyone , this is an up date . So far i have located the leak it was around the compressor . Not sure if it from the compressor or the hoses to it. I would like to know how do i determine if its the compressor and not the hose seals . Would the dye leak down to on the compressor if the hoses seal r wore or when there is a leak on the compressor it self..... does the dye just move from the bottom of the compressor to the hoses . please bare with me if i haven't explain it right .

mk378 on Tue April 01, 2008 10:53 PM User is offline

Pretty common for compressors to leak where the case joins together, or at the front shaft, or at the relief valve (if equipped). If you have positive pressure in the system put soapy water on various parts and see if it bubbles up. Also you can clean all the dye off to see where it starts coming out first, but likely none will come out unless the system is charged and running.

ehrlich on Wed April 02, 2008 3:33 PM User is offline

hi , can the compressor be repair by a novice if it leaks by the case joining?

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