using hall sender to trigger tdc sensor?

[urq]

> I was wondering if I could use the hall sender in the distributor to
> trigger the tdc terminals of my ecu to get my 200q running? I have a
> couple of books for the wiring, but the conflict is if the dist gives
> off more signals than the flywheel, but the ecu eliminates the other
> signals because the flywheel confirms the position of tdc?

... I don't think I'd even suggest trying to fake the signals ... the timing
signals from the pins are used by the ECU to precisely determine the
ignition timing, and there are errors in the path from the crank to the
dizzy which might well create even more problems in your engine.
Furthermore, the output of the Hall Sender is a digital signal (1 or 0)
while the timing sensors have a much more analog signal coming from them as
the pin flies by ...
>
> I'm gonna get a new tdc pin welded up tomorrow, but just wondering.
>
> BTW- what's the vag part number of the replacement pin?
>
I don't know if you have an MC or a 3B, but from TFA it doesn't seem to
matter.  It also appears that TFA is a bit confused as the pins go.  From
the diagram I would say that your part number is N 904 013 210 1 (Item #11,
MG 1, SG 5, Ill 5-00), quantity is stated as two ... but the description is
"housing for lighter" ... ???  There are two other dowels listed ... Item
11A, Qty 1 N 902 318 01 "dowel pin 4H8X20" and item 12, Qty 3 N 013 210 1
"dowel pin 6M6X16".  I'm pretty sure Item 12 is for the pins that locate the
pressure plate ...

Good luck!  Sorry to hear you learned the lesson about not using the proper
tools the hard way.  I figure that the money I save on doing the job one
time more than pays for the tools ... and they usually end up saving my time
in doing the job as well.  With all the Audis in my garage and driveway I've
found I've needed them pretty often as well ...

Steve Buchholz
San Jose, CA (USA)