Re: [T3] Gutless / No torque / No power leaving a stop

[Jim Adney <jadney@vwtype3.org>]

On 28 May 2005 at 0:23, Elroyyy@aol.com wrote:

> >'73s should be timed to TDC. '72-3 timing marks are different (  |   |   | | 
>  ) 
> from the earlier years, so you may actually be doing this right. The second 
> mark, counting L to R, is TDC. Earlier marks look like   |    | | |, where 
> the leftmost mark is TDC.
> 
> It's timed to the third mark from the left. According to Bently this is 5 deg 
> BTDC and where it should be timed. Muir concurs, but calls it 7.5 deg BTDC.

Which timing mark style do you have? I have to ask, just because the engine may 
have been changed. Third mark from the left is different depending on which 
pulley you have. It's 10 deg on engines up thru '71 and 5 deg thereafter.

I just checked and you're right; I was mistaken about the correct timing. The 
'73 engines get timed to 5 BTDC, which is the third mark from the left on the 
'73 pulley.

I love the Muir book, but when the 2 disagree, the Bentley is almost always 
right.

> >I've certainly seen a few problems with '72-3 TVSs, but they all show up at 
> cruising speed. Do you have it adjusted right? That could certainly make a 
> difference. Adjustment of these generally takes an Ohmmeter.
> 
> The short answer is no. I don't have it adjusted right. Bently and Muir use 
> the "click plus one tick" method. I've seen where you've written (more than a 
> few times) that this is incorrect.
> I have an Ohmmeter. What is the correct way?

Only the 68-9 TVS makes an audible click. The later ones are all silent.

For the 72-3 TVS with 5 pins:

With the throttle at idle, loosen the fixing screws for the TVS. Attach the 
Ohmmeter to pins 17 & 12(47). The numbers are molded into the plastic, but 
these are the 2nd and 3rd pins up from the bottom.

Adjust the position of the TVS so that the contact just goes open each time you 
let the throttle back down to idle. 

-- 
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Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
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