[T3] 73 auto trans type 3 ARR ?

Sun Jun 11 18:37:01 PDT 2023

If it pings with stock timing and cam, your CR is too high.
I was never able to run less than 89 on my stock engine, and that was with stepped heads.
The vacuum can is there to advance timing under light load for better gas mileage, under heavy loads
Where it pings, the can has no effect.

Keith

Topnotch Restorations
topnotch at nycap.rr.com
http://www.topnotchresto.com
71 Squareback  “Hothe”
65 Notchback  “El Baja Rojo”
93 RX7  “Redstur”
13 Subaru Outback "Blendin"

-----Original Message-----
From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org> On Behalf Of William Jahn
Sent: Sunday, June 11, 2023 9:24 PM
To: type3 at vwtype3.org
Subject: Re: [T3] 73 auto trans type 3 ARR ?

I did all of that. Besides right now I don't have the vacuum line on the can , when I did, it pinged , I never figured out why. I used to connect it before the gas became so bad here. Now I would need to retard the base timing ,then it becomes a trade off.

On Sun, Jun 11, 2023 at 5:28 PM Keith Park <topnotch at nycap.rr.com> wrote:

> Sometimes the ball bearing in the distributor wears a spot on the 
> plate and stick here, you need to smooth that out and Lube it.
>
> Keith
>
>
> Topnotch Restorations
> topnotch at nycap.rr.com
> http://www.topnotchresto.com
> 71 Squareback  “Hothe”
> 65 Notchback  “El Baja Rojo”
> 93 RX7  “Redstur”
> 13 Subaru Outback "Blendin"
>
> -----Original Message-----
> From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org> 
> On Behalf Of William Jahn
> Sent: Sunday, June 11, 2023 8:00 PM
> To: type3 at vwtype3.org
> Subject: Re: [T3] 73 auto trans type 3 ARR ?
>
> Checking with a timing light shows me at idle when this happens the 
> timing is advanced then drops back to the 5 degree BTDC then once I 
> increase the RPM it will advance to much at idle or hang . It's not 
> consistent, it's not over advancing but it's not returning to 5 
> degrees DBTC so it's causing the idle to be high most of the time. I 
> do know the timing is set at 3 degrees BTDC because when it does not 
> hang I see this reading when it works and it's consistent . That is 
> where I set it because 5 BTDC causes a slight ping with the fuel we 
> have here. Doing this did not cause the loss of any power , in fact it pulled better.
>
> On Sun, Jun 11, 2023 at 4:50 PM William Jahn <willjahn975 at gmail.com>
> wrote:
>
> > I looked at all the vacuum lines and could not find one loose or bad.
> > I do know if the trans modulator leaks you lose trans fluid and if 
> > the line is off the trans will slam into gear. I know this because 
> > once adjusting it on the road I forgot to connect it, The plastic 
> > Tee is fine and everything else. No leaking gaskets besides I 
> > replaced them all. I did order the two caps for the breather box 
> > since mine are old
> and hard .
> >
> >  I checked the dist and the rotor snaps back as it should. But that 
> > does not mean while it's running a weight is not sticking. I have 
> > the
> > 73 AG for a 73 manual trans I rebuilt so I will put that in and see 
> > if the AH has some issue. Of all the work I did the dist has been in 
> > there the longest and besides it could use the trigger point cam lubed .
> >
> >  That seems to be the most likely problem as far as I can tell.
> >
> >
> >
> > On Sat, Jun 10, 2023 at 11:23 PM <jadney at vwtype3.org> wrote:
> >
> >> On 10 Jun 2023 at 16:46, William Jahn wrote:
> >>
> >> >  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.
> >>
> >> Okay, sounds like you've got all those things covered.
> >>
> >> Have you checked the tightness of the two screws for the cold start
> valve?
> >>
> >> How about the hoses for the AT vacuum modulator?
> >>
> >> Does your engine still have the EGR valve and plumbing? If so, have 
> >> you blocked it off?
> >> Checked the short hose that connects the 2-piece pipe to the IAD? 
> >> (I made a blockoff plate for the flange to the EGR valve inlet and 
> >> sealed it with one of those tiny VW metal manifold warmup gaskets.
> >> The heat exchanger also got a blockoff plate and gasket.
> >> My EGR filter fell
> >> apart and has been completely removed.)
> >>
> >> You could try flushing out the idle air channel with something like 
> >> WD-40. And check the
> >> '72-3 crankcase breather that vents into the IAD cover; could there 
> >> be something intermittent there? (Flush the breather port in the 
> >> cover and the PCV valve in the breather box with
> >> WD-40 to make sure they're not clogged with gooey oil.)
> >>
> >> Keith's suggestion of looking for a leak with an unlit propane 
> >> torch is always something to consider, but I've always found this 
> >> to be hard to interpret. Maybe I've just never come across a large 
> >> enough leak.
> >>
> >> If all those seem okay, yeah, maybe there's a problem with the 
> >> distributor. You should be able to see if the timing always comes 
> >> back to the same point at idle with a timing light, but, again, 
> >> that's hard to interpret, since the timing SHOULD change between
> >> 800 and 1400
> >> RPM. Maybe you can just watch how it moves as you move the throttle 
> >> and RPMs up and down.
> >>
> >> --
> >> *******************************
> >> Jim Adney, jadney at vwtype3.org
> >> Madison, Wisconsin, USA
> >> *******************************
> >>
> >> _______________________________________________
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> >
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