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  1. #1

    Default rough idle with a/c

    When I have the A/C on the engine has a rough idle. Also, when any fan setting is on, the A/C compressor cycles on and off.

    Is this normal?

    Is there anyway to determine if a compressor is on it's last legs?
    1988 C1500
    5.7L
    Old and Beat Up!
    I love it!

  2. #2

    Default

    If the compressor cycles it is low on freon...
    Still Loyal to GM after all these years...:shocked:
    2006 Impala LT 3.5L
    2005 Silverado WT small cab/longbed 4x4 4.3L V6
    1999 Grand Am 3.4L in TX w/ our youngest
    1993 GMC Jimmy 4.3L 4 door 4x4 'Ole Rusty' - 'SOLD'
    1988 S-10 small cab/longbed HT3.4L Crate Engine
    1970 Nova 250 I-6, factory 3 sp floor shifter.
    1968 Chevelle 'Nomad' Wagon 250 I-6 w/ 3 on da' tree.

  3. #3

    Default

    Also, the pressure could be too high. If there's a clog somewhere in the lines, the pressure will go up rapidly, and the pressure cut-out switch on the condenser will cut power to keep from hurting the compressor.

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