[T3] 73 squareback auto trans FI question

William Jahn willjahn975 at gmail.com
Tue May 17 14:38:15 PDT 2022

I haven't checked the timing . I don't know how it would change with so few
miles. What I need to do is start and drive it to see if it's still the
same then go from there. Last time I checked the timing using an Actron
timing light I was told to check the timing engine hot . The trouble with
that is the induction clip is metal and gets so hot it affects the reading
at least that's what Actron told me. I used to just start it and  plug the
AAR hose and check it soon after startup. Read someone doing it static
would use a spare plug wire and a spark plug grounded to see exactly when
the plug fired rather than static time with a light bulb.

On Tue, May 17, 2022 at 2:13 PM Jim Adney <jadney at vwtype3.org> wrote:

> On 17 May 2022 at 10:31, William Jahn wrote:
> > and the battery even after a 1
> > mile drive reads 12.5 VDC.
> Right after driving, I'd expect the battery to be above 13.
> >  I thought perhaps since dry weather is less dense that might be the
> issue
> > since the MPS does not adjust for this just altitude as far as I know.
> Your engine only cares how much oxygen it's getting. I don't know how much
> the % of oxygen changes with changes in humidity. Perhaps someone here
> does.
> Bill Fisher's book talks about compensating for humidity when jetting
> carbs.
> It's possible that the operating principle of carbs, Bernoulli's
> principle, is
> more dependent on density than pressure.
> >  I did install points and they only have 1,100 miles on them and
> > while driving I don't feel any difference in pickup and they still look
> new
> > and the gap hasn't changed.
> Did you check the ignition timing? That would be the important thing to
> check.
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
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