[V8] HVAC system output goes to defrost and floor upon acceleration

Coleman, David David.Coleman at blackrock.com
Wed Jul 11 15:50:03 EDT 2007

Could this be related to the car's feature of temporarily shutting down
the compressor at WOT?

Or am I thinking of something else?


> -----Original Message-----
> From: v8-bounces at audifans.com 
> [mailto:v8-bounces at audifans.com] On Behalf Of Ed Kellock
> Sent: Wednesday, July 11, 2007 3:48 PM
> To: Quattro List; 200 list; V8
> Subject: [V8] HVAC system output goes to defrost and floor 
> upon acceleration
> I've seen it many times before but I've forgotten the cause 
> and can't seem to find it in the archives.
> When I open the throttle to accelerate or hold speed going up 
> a hill, the blower output goes to the floor and the 
> windshield.  This is happening on both my Avant and my 93 V8.
> Is this as simple as a vacuum leak somewhere?
> On the Avant, I checked the black supply line from the engine 
> and it is still connected in the engine compartment and in 
> the plenum are at the base of the windshield.
> What else should I look for?
> Thanks,
> Ed
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