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help with a/c not cooling

This is a discussion on help with a/c not cooling within the General Help forums, part of the LSx Technical Help Section category; i have a 99 ss and the air is not short cycling and has about 29 / 30 psi on ...

  1. #1
    Junior Member
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    white
    1999 SS 1 of 63 made

    help with a/c not cooling

    i have a 99 ss and the air is not short cycling and has about 29 / 30 psi on the air cond. gauges is there some other probs that i dont know about ....
    air is warm not cold

  2. #2
    Member cailey37's Avatar
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    1998 Pontiac Trans Am

    Is the compressor kicking it at all??????

  3. #3
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    white
    1999 SS 1 of 63 made

    yeah the comp is running and doing like it is suppose to but no cold air

  4. #4
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    Static pressure should be 70 above 75*, 100 above 90*. 86-95* ambient with it running should read 42-46 psi low side (above 30% humidity). Out of my helms...search and see if someone has posted an AC performance chart for the LS1. Maybe it's just low?

  5. #5
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    white
    1999 SS 1 of 63 made

    thanx it reads with the air running on max 29/ 30psi

  6. #6
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    red
    2001 formula

    I just got done redoing my 01 formula. That pressure reading is probably low. What pressure is the high side reading? I put 2 and 1/2 cans in my firebird and with the a/c high blower and on max my pressures read around 30-40 on the low side and the high side was around 225-240 and I was putting out around 53 degrees car not moving and at cruising speed it cools 47-48 degrees this was with an outside temp of 92 degrees. We really need to know the high side to determine if the compressor is operating properly

  7. #7
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    One more and I'm gone....

    i had the same problem last week....i took it to gm and they told me that it was the compressor they wanted 2grand for everything....i was like WTF??? and took it to a local mechanic...he put some coolant and im good....5 bucks

  8. #8
    Veteran Hi-Po's Avatar
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    1999 TA WS.6

    wow, 2 grand? They were really trying to bend you over on that.

  9. #9
    Veteran Hi-Po's Avatar
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    1999 TA WS.6

    As said, AC is such a simple design. Its all about pressures. If you dont haveem right, you arnt going to blow cold. Go buy a set of gauges, dont take it to the dealer, they are going to bend you over. Learn how easy it is to master AC problems with a simple set of gauges, and charge your buddies 35 bucks an hour. Test your pressures on both low side and high side and get back to us.

  10. #10
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    One more and I'm gone....

    Quote Originally Posted by Hi-Po View Post
    wow, 2 grand? They were really trying to bend you over on that.
    big time...without any lube at all

  11. #11
    Senior Member 02z28ls1's Avatar
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    2002 Z-28 Camaro M6

    Quote Originally Posted by burnws6 View Post
    i had the same problem last week....i took it to gm and they told me that it was the compressor they wanted 2grand for everything....i was like WTF??? and took it to a local mechanic...he put some coolant and im good....5 bucks
    put some coolant in what? the radiator?

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