Re: A/C+rought idle

[rmyers@olie.wvitcoe.wvnet.edu (Robert Myers)]

>	My car idle very rought (like diesel pickup) when the A/C button
>is pressed, the idling rpm when this button turned on is 800 rpm.
>      	When I turn A/C off the car has smooth idling ,and the rpm is same
>(800) . Does the compressor cause the problem here ?
>				thanks 
>
>

More than likely.  The compressor takes quite a bit of horsepower to run.
This will put a fair load on an idling engine.  It's also noticeable at
speed, but the effect isn't nearly so pronounced.  

I understand that the idle speed can be adjusted fairly easily.  I haven't
messed with it in my 200TQ, but it's pretty straighforward in other cars
I've worked on.  Before I started messing with it, I think I'd find out the
correct technique for Audis.  :-)  Probably, as the start of the procedure,
you are to bow down before the car and make a generous monetary offering
while gently rubbing the four rings with a Zymol soaked chamois.  :-)  After
that, you'd better check with someone who knows the rest of the ritual (like
which screw to turn which direction and how much). 



Bob
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   *  Robert L. Myers  <rmyers@olie.wvitcoe.wvnet.edu>      *
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