Jeep lose power with the AC ON

Discussion in 'KJ General Discussion' started by Danihound, Dec 12, 2019.

  1. Danihound

    Danihound New Member

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    Hi guys, my jeep liberty 3.7 L 2005 lose power if i have the AC ON and at full power (4) or almost full power (3) it starts to accelerate slower and slower until it dosnt move, but if i just put it on 2 or 1 it recovers its power like nothing happened.

    Could this be related to a leak i have in the radiator tank? im going to fix it next week, but i would like to know if it could be related to it, or if i need to do something else?.
     
  2. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    Yes definitely fix the coolant leak. A poorly pressurized system is not good.
    Use hoat coolant or zerex g05 only.
    I think what you are trying to describe is that when the compressor is engaged, you loose quite a bit of engine power.
    Pretty normal for a v-6 that is quite heavy, very noticeable climbing hills.
    The compressor runs more with less cycling, when re-circulation mode and fan position 4 is selected for instance.
     
  3. Jaybird91

    Jaybird91 Member

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    I have the same problem the other day with the a/c on and i was getting on the fwy. Very little power as if my jeep was starving for air. Anything that could help?
     
  4. turblediesel

    turblediesel memberable

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    AC clutch going bad? AC compresser bearings toasted?

    I think the service manual has a table showing what heater/AC settings use the AC. AC comes into play a lot without its' button being pushed.

    Sounds like a big strain on the serpentine belt.