Fw: [T3] Mystery wire

["Shirleyclan" <shirleyclan@home.com>]

----- Original Message -----
From: "Shirleyclan" <shirleyclan@home.com>
To: "Jim Adney" <jadney@vwtype3.org>; <type3@vwtype3.org>
Sent: Tuesday, July 31, 2001 9:58 AM
Subject: Re: [T3] Mystery wire


> thanks for the info Jim A. I took the car for along drive tonight about 20
> miles, when I came to a stop sign the car idle drooped way off (oil light
> would flicker) when I put the transmission in neutral. the idle returns to
> normal. I've been over and over the FI using Muir's book, Bentley manual
and
> I have a Henry Elfrink manual. When the engine is warmed up (air regulator
> closed) the idle air fuel/air mixture seams to be a problem, because when
> the air regulator is open it seams to run fin. The valve are set OK, they
> are hydraulic, the timing was set using the Bentley manual. The picture in
> the Bentley isn't really clear but the timing calls for 5 BTDC (engine
code
> X). Looking at the pulley at TDC is the first line, then small space, next
> line (5 BTDC), then small space and two lines next to each other.  The
> Elfrink book shows a pulley with marks that are close. The fuel pressure
is
> set at 28 psi, I've been told I should raise it to about 35 psi, haven't
> done that yet. Maybe I can get to it this weekend. I am fairly sure the
> mechanical advance is working because when my vacuum advance can went bad,
I
> could feel the mechanical advance kick in. Above idle it runs like a
champ!
> Jim Shirley
> ----- Original Message -----
> From: "Jim Adney" <jadney@vwtype3.org>
> To: <type3@vwtype3.org>
> Sent: Tuesday, July 31, 2001 2:32 PM
> Subject: RE: [T3] Mystery wire
>
>
> > On 31 Jul 2001, at 13:54, Shirley, James J CDR (CNSP N4341) wrote:
> >
> > > Here's what I'm looking at. I replaced my engine with a 1600 longblock
> > > with hydraulic lifters with an automatic, the engine was rebuilt to
> > > burn unleaded fuel. I am not sure what that means short of using
> > > different seats and valves, plus I think they machined the combustion
> > > chamber shape.
> >
> > All OE heads and valve gear have been suitable for non leaded gas
> > since something like '66; before that the only thing you need to
> > change was the valves, replacing them with later valves. It is
> > common in today's marketplace to charge extra for what should be
> > the norm, but the old valves are still available (and cheaper) and
> > you don't want them.
> >
> > If they machined the combustion chamber to lower the CR, then
> > this is probably a good thing.
> >
> > > The engine runs strong but the idle is rough and at the lower end
> > > it's sluggish. I've worked through the entire FI system component
> > > by component and wiring harness. The Muir book was an excellent
> > > guide.
> >
> > Muir isn't bad, but the Bentley is better. For just the FI there were
> > even better manuals put out by Henry Elfrink, now long out of print.
> >
> > > I paid a visit to the wrecking yard yesterday and took a really
> > > close look at the ECU that was marked with yellow paint 73 T-3.
> > > Turns out if you turned it just right in the sun you could read
> > > what was left of the silver (was brown) label. The pn was
> > > 022-906-021E a 73 T-4.
> >
> > Okay, I'm glad you followed up on this and settled this, at least for
> > the moment.
> >
> > I suggest that you divert yourself from the FI innards and think
> > about the basics. Muir gets some of these wrong for the type 3.
> > Check your mechanical advance, valve lash, and especially your
> > engine timing. What year do you have? What do your timing marks
> > look like? What are you timing it to? Along the FI lines, have you
> > measured the fuel pressure? It should be 30 psi.
> >
> > I seem to recall that this was a 72 which is a bit of a bear to time
> > because the proceedure is complicated. Muir does NOT cover this
> > right; Bentley does.
> >
> > -
> > Jim Adney
> > jadney@vwtype3.org
> > Madison, WI 53711-3054
> > USA
> >
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> >
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