Date: Wed, 22 Aug 2001 13:07:23 -0400
Reply-To: Jay L Snyder <Jay.L.Snyder@USA.DUPONT.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jay L Snyder <Jay.L.Snyder@USA.DUPONT.COM>
Subject: Re: Digijet Distributor Questions
Content-Type: text/plain; charset=us-ascii
The '85 layout is different (see Bentley), there is an early and late
layout. I have the late, as I also have the single throttle switch set up.
I may have the advance/retard ports confused. If the fuel pressure
regulator is teed into the retard side, everything makes sense. The rotor
moves CW, so if the front (towards dist. cap) pulls, it would retard the
timing. The back port (towards the manifold) must be the advance side,
because the vacuum source at the throttle body would be the one that senses
engine load/throttle plate angle.
"Joe Romas" <jromas@columbus.rr.com> on 08/22/2001 12:52:51 PM
To: Jay L Snyder/AE/DuPont
cc:
Subject: Re: Digijet Distributor Questions
Jay,
I just looked at my 84 and the advance, the side away from the distributor
goes to a fitting on the front side of the throttle body with a t going
over
to the right front somewhere. The retard, closest to the distributor, goes
to a fitting on the rear of the throttle body just below the idle screw.
The
fuel pressure regulator has a hose going down to the large box where the
intake pipes go into almost directly below the regulator. Sounds like your
hoses are in the wrong places and that's why things arn't working
correctly.
If you need a picture I can send one this evening. Let me know.
Joe.
----- Original Message -----
From: "Jay L Snyder" <Jay.L.Snyder@USA.DUPONT.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, August 22, 2001 11:40 AM
Subject: Digijet Distributor Questions
> I have an '85 1.9l with the vacuum advance/retard distributor. I realize
> the two vacuum ports are connected to different sources of vacuum--the
> advance (which is teed in with the fuel pressure regulator) comes right
off
> of the center "manifold" box and the retard comes off of the throttle
body
> somewhere (venturi?). I put my vacuum guage on the line that goes to
the
> advance port on the distributor. For some reason, the timing wants to
> advance and the engine runs faster. This I don't understand at all. How
> could disconnecting the advance side cause it to advance further? I have
> 15" Hg at this point. Yes, I have the lines correctly installed.
> I would appreciate any ideas on this and possibly a quick theory on the
> purpose of the vacuum retard.
>
> Jay
>
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