DIS and DIST ref pulse

[Tedscj at aol.com]

In a message dated 3/5/99 12:59:41 PM Eastern Standard Time,
mansfield at cns.ohiou.edu writes:

> I understand the DIS/IDI systems use a sync pulse each revolution of the
>  crank, but with Ted's recent SyTy experiments, it seems that the ECM does
>  not use this sync pulse?  Does the DIS module "consume" this pulse?
>  
>  I guess what I am really getting at is what does the signal that goes to
>  the ECM look like from a DIS v. DIST system compared to the signal that
>  goes to the module.  Are they 5v?  When do they go high/go low?  Does the
>  module create the pulse for the ECM or does the reluctor?
>  
>  Thanks for any insight.
>  
>  
>  Doug


My DIS module recieves a synced pulse from the magnetic pickup which is
reading a reluctor.  The wheel is a "6+1" wheel (actually a pulley that I
rigged up).
The DIS module DOES NOT send a synced pulse to the ECM.
However, there is an unused pin on the DIS module.  Perhaps this could be the
sync pulse.  But with my batchfire ECM (7730) that pin is unused and the plug
is molded in such a way that I can't get to it to see what it's doing.

Ted