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  • AC causing engine to cycle

    when im in park and turn the AC on the engine will start cycling like it will go from 1000 RPM to 1500 RPM constantly does anybody know what the problem is and how to help, me this is really startin to piss me off.

  • #2
    Weird.
    AIM: escalier deverre<br />\'02 Pearl Blue Metallic RSX-S (daily driver)<br />\'98 Black Firebird<br />98 V6 turbocharged to 02 LS1 swap<br />\'02 LS1/4L60E<br />LS6 Block, LS6 Intake Manifold, Thunder Racing 215/220 .600/.523/115 Cam, Titanium Retainers, Crane Double Valve Springs, 125 shot NX Wet Kit w/ NOS brand Purge, True Dual \"H\" Pipe w/ two chambers and dumps, 17x11(rear) and 17x9.5(front) Black Powdercoated ZR1 Replicas on 315 and 275 BFGoodrich Comp T/A\'s (Street)/ET Drags/Skinnies on Weldlites(Track), 3.42/LSD

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    • #3
      Isn't that normal? I know my idle bumps up a little when I crank on the AC...
      <a href=\"http://pics.projectpredator.com/thumbnails.php?album=16\" target=\"_blank\">2003 Zinc Yellow Mustang GT</a> 1 of 701<br />ET : TBD<br />But our shenanigans are cheeky and fun! Yeah, and his shenanigans are cruel and tragic. Which... makes t

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      • #4
        I'd suggest popping the hood and seeing if the compressor is cycling on and off .. like every few seconds it comes on then shuts off.. if that's what's happening then you likely have low freon.. the compressor will do this in order to keep from burning up if you are low on freon..
        -Brad
        98 Firebird - gone from mod mode to keep it running and useable mode.
        2000 V-Star Custom 1100
        If all else fails use a bigger hammer!
        :rock:

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        • #5
          hey thx man thats what it was i was just low on freon thx for the help

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          • #6
            being low on refridgerant will not cause the motor to rev to 1500. and the a/c compressor is SUPPOSED to cycle on and off, which will cause the engine rpm to change slightly. If you are too low on refridgerant, the compressor will completely stop after you drive and will just blow hot air.
            1995 Firebird 3.4L<br /><a href=\"http://kansas.no-ip.com/\" target=\"_blank\">My Site</a>

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