Technical aspects of automobiles

a/c recharge ?

hello i just put a can of freon r134a in my 98 dodge stratus and have a ?
about it.  when i put the refill gauge on it at first, it said low ( in the
green area on gauge) then when i put the can of freon onto it and emptied
it, it was in the blue range which means full. now i noticed the more i
reved the engine,then the gauge would fall down toward the green area. does
this mean i need more freon so that when i rev it good it stays in the full
area on the gauge?  thanks Randy

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One Response to “a/c recharge ?”

  1. admin says:

    "Randy Pape" <rpa…@wi.rr.com> wrote in message

    news:468fecc2$0$24708$4c368faf@roadrunner.com…

    > hello i just put a can of freon r134a in my 98 dodge stratus and have a ?
    > about it.  when i put the refill gauge on it at first, it said low ( in
    > the green area on gauge) then when i put the can of freon onto it and
    > emptied it, it was in the blue range which means full. now i noticed the
    > more i reved the engine,then the gauge would fall down toward the green
    > area. does this mean i need more freon so that when i rev it good it stays
    > in the full area on the gauge?  thanks Randy

    The system has to reach an equilibrium before pressure readings mean much.
    You add some refrigerant, and then wait until the pressures stabilize at
    idle.

    The proper way to do it is to use a refrigerant recovery machine so that you
    can
    get the exact charge into the system.  If you cannot do this, you must go
    slowly,
    watch the pressure as it stabilizes, and charge to the "blue" (or whatever)
    zone.
    This is less accurate but is usually successful.

    You can also measure the temperature of the air and shoot for the best
    compromise
    of pressure and temperature.

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