[T3] 73 auto trans type 3 ARR ?

[Keith Park]

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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