[s-cars] [V8] Any body still here? A 92+ Climate Control Q

[Ingo Rautenberg]

Well, guys, in my informal test with the car not running I can switch  
between center, defrost and lower vents all day long and they will  
hold just fine (I believe the 92+ CC uses servos rather than vacuum  
for this).  Not so on the recirc. Wont 'engage' at all.  I'll copy  
this to the S-Car List  -- same cc unit (except they're boosting ;-)

Ingo

On Aug 2, 2007, at 4:02 AM, urq wrote:

> ... I think Ingo's looking in the right direction ... the vacuum that
> controls the flaps and valves is completely separate from the  
> refrigerant
> compressor.  Even with the compressor momentarily disengaged the  
> system will
> continue to cool the car.  The mode as viewed from the inside of  
> the car
> should not change just because the engine's at WOT.
>
> I would think that another test that could be done is to try  
> cycling the
> system between modes when the engine isn't running.  If there's a  
> bad check
> valve then the reservoir will be depleted and it will not be  
> possible to
> move the recirc flap or any of the air routing doors ...
>
> Steve B
> San José, CA (USA)
>
> -----Original Message-----
>
> Ingo.. not 100% but the TPS will cut off the compressor under WOT..  
> and
> that will affect the recirculate mode (CC Head see the compressor as
> "off", so stop the last mode and return to normal.
>
> You can test this out in the driveway.. car running; ac on and in
> recirculate.. pull the connector at the compressor to turn it off, it
> should switch modes.
>

My original post to the V8 list:

So it's been quite hot here lately. And just in time, I've been
driving the '93 with functioning A/C :-) -- hey, it was 97 today!
And I prefer to run the CC in recirculate mode, but have noticed that
under strong accel (kickdown) the recirc will disengage.  So I'm
thinking vacuum check valve? Any BTDT?

TIA

Ingo