1995 Chevy Suburban

1995 CHEVROLET SUBURBAN
181,000 MILES • V8 • 4WD • AUTOMATIC
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RRAYB
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When the A/C is turned on the compressor clutch engages for about 8 seconds and disengages. With the gauge set attached it pumps the low side down to about 15 lbs almost instantly then it takes it about 3+minutes to come back up to about 40 psi and the clutch will engage again for about 3 seconds and the pressure will again drop to about15 psi and the clutch will disengage.
I changed the orifice tube (it was plugged) and recharged the system and it still works the same as before
I've had this truck for 6 years and since I diidn't buy it new I have no history on it. The junk in the orifice tube looked like stop leak. Untill now the A/C has always worked but always about 40 degrees max. Any Idea where the blockage might be?
Thanks ---Ron
Jun 2, 2010 at 4:07 PM
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2CARPRO JACK
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Sounds like it is low on charge.The low side should be around 35-40 while compessor is engaged.Do you have the high-side hooked up as well? if so what pressures do you have there.You should be around 200+ when the system is fully charged
Jun 2, 2010 at 5:14 PM
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RRAYB
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[quote:dcdee07b99="2CarPros Jack"]Sounds like it is low on charge.The low side should be around 35-40 while compessor is engaged.Do you have the high-side hooked up as well? if so what pressures do you have there.You should be around 200+ when the system is fully charged[/quote:dcdee07b99]
Jun 2, 2010 at 9:20 PM
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2CARPRO JACK
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Have you checked the high side pressure?
Jun 3, 2010 at 7:48 AM