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1995 Chevy Suburban

Tiny
RRAYB
  • MEMBER
  • 1995 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 181,000 MILES
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
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Wednesday, June 2nd, 2010 AT 4:07 PM

3 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
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
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Wednesday, June 2nd, 2010 AT 5:14 PM
Tiny
RRAYB
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Wednesday, June 2nd, 2010 AT 9:20 PM
Tiny
2CARPRO JACK
  • MECHANIC
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Have you checked the high side pressure?
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Thursday, June 3rd, 2010 AT 7:48 AM

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