"Rick Shockley" <reshock3@bellsouth.net> wrote in message
news:iMSii.22062$Fo1.8825@bignews7.bellsouth.net.. .
> The ac blows cold while car is at idle but the faster the engine turns
> less cold air is being produced. I have no leaks and correct amount of
> R134, ANY SUGGESTIONS.
>
>
At the risk of sounding like a broken record, this sounds like a job for a
pro. I fear the compressor valves are failing, but R134a is spooky enough
that it could also be a symptom of slightly low charge. If it has been
evacuated and filled by weight you have the correct charge as you say,
otherwise probably not. A tech can also tell you by the pressure behavior if
the valves are leaky.

Or, as Bill says, it could also be vacuum problems. From my experience with
the vacuum problems in my '85 765T, if it is vacuum you should feel the air
getting cold within a couple seconds of letting off the throttle from
highway speeds. Charge problems shouldn't respond that quickly.

One more thing - a long shot but quick and cheap - try spraying the
condensor with a spray attachment on a garden hose. Dirt in there can do
weird things and it never hurts to make sure it's clean. (Been humbled by
that myself.)

Mike