82 coupe heat/idle problem

[Huw Powell]

> > could be... the warm up regulator problems making it run too rich
> > could be... the vacuum leak you don't have
> >
>
> It isn't running too rich....the plugs would foul if so.
>
> I am leaning towards vacuum leak b/c the way the idle drops off when it is
> dying.  When I replaced the vacuum lines yesterday, when I pulled one of them
> off I heard a huge rush of air and the flapper inside the vehicle shut....so
> the system is holding pressure.

but the "system" is not supposed to hold pressure... not the engine side
of things, anyway.  (I assume you did this with the engine off) The
brake boost and the AC recirculation flap supply are both on the "other
side" of one way valves, they do hold pressure.  Try checking your idle
screw on the throttle body (and pull the big black accordian hose and
check to see how clean the throttle butterflies are).  If no idle air is
entering in this way, that would make the same symptoms you are seeing -
and maybe even "make the system hold pressure," I suppose.

Also, carefully compare your vacuum hose routing to the sticker under
your hood, maybe something got crosses somewhere?

Oh, and check this out as well, it should be the same as your car:

http://www.humanspeakers.com/audi/vacuum-system.htm

Good luck!

--
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/