[T3] 73 auto trans type 3 ARR ?

[William Jahn]

 I got new Intake gaskets from you Jim. I did this work at the end of 2019
. I cleaned everything and even sealed the IAD back cover gasket using
silicone on both sides. Let it set up the 4 bolts loose then when dry
tightened them. I replaced every vacuum hose  and the injector seals and
all the fuel line . I made certain the IAD lined up perfectly with the
runners , and had to bend 2 slightly.

 All I am certain of is that the AAR does work. Either I have a vacuum leak
at a hose or perhaps the dist has some issue. The MAP doesn't appear to
have any issues. Worst or all is an intermittent vacuum leak. I can call it
intermittent in a sense yet it does this most of the time, When I first
start it cold the idle is 1000 then depending could be 10 minutes or longer
than the idle climbs to  1400 in park , in drive I have it set to 1000 in
park so in drive when working it was 850. That's what It was not long ago.
  On todays drive it acted like it's old self until I got home then it went
back up in park so I checked and the AAR was not drawing any air engine
running. I might see if the AAR hose to the IAD is at fault , I do have it
clamped on both ends and it's a new hose.

On Sat, Jun 10, 2023 at 3:47 PM Jim Adney <jadney at vwtype3.org> wrote:

> On 10 Jun 2023 at 13:50, William Jahn wrote:
>
> >  I checked the AAR today and drove the car. The AAR was open cold 76
> > Degrees here. After I blew in the hose to see if it was open, engine off.
> > Then I drove it today the RPM never increased and actually dropped down
> to
> > 800 RPM in drive. Once I got home I checked it and it was closed. I
> didn't
> > feel any suction at all however the idle was back up to 1400 RPM.
>
> It sounds like you're getting the right results, but I recommend that you
> not
> test by blowing in the hose or feeling for suction. Both can be misleading.
>
> Just test with the engine running, to see if the idle speed changes as you
> block and unblock the AAR inlet hose.
>
> > I now know it's not the AAR , All I can think of is some new vacuum leak
> and
> > I didn't see any hoses off and just changed them all last year along with
> > everything else intake gaskets, Rummer boots , injector seals, fuel
> lines,
> > every single hose.
>
> I now understand your problem. It wasn't clear before. Yes, it sounds like
> you have some sort of intermittent air leak.
>
> Did you use the correct FI manifold gaskets, the paper/phenolic ones, not
> the metal Beetle ones?
>
> Are each of the small injector seals properly seated in the recesses in
> the air
> runners? Are the 4 bolts that hold the rear cover on the IAD tight?
>
> When installing the intake runners, you may also need to let the IAD
> settle
> into its best position, along with the runners, followed by possible
> bending of
> some of the runners to get good alignment, so the runner boots don't get
> distorted and leak.
>
> Another possible source for a SMALL intake leak is the large O-ring in the
> MAP sensor. This would make the FI run rich, but might not make a
> perceptable difference in the idle speed.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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