Another Intro + DIS w/ '749 .bin

[Bruce Plecan]

-----Original Message-----
From: Tedscj at aol.com <Tedscj at aol.com>
To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Date: Friday, February 12, 1999 4:38 PM
Subject: Re: Another Intro + DIS w/ '749 .bin


What year 2.8 module are you using?.
Are you using the crank sensor to read the "bolts";
Bruce

> >Actually, my DIS uses a reluctor/coil trigger.  At least that's how I got
> it
> >working on my engine!  I welded bolt heads to a pulley every 60degrees,
> plus
> >the reference "bolt" 10degrees ATDC.  Plus the magnetic pickup, of
course.
> > >>
>
>
>There is only one pickup.  It is the ruluctor/magnetic coil type.  It sends
>it's signal to the DIS module.
>In the original 2.8L v6, from which the DIS module came, Had a reluctor
wheel
>cast into the crank.  The sensor is inserted into the block and comes
within
>.050inces of the wheel.
>MY car did not have this reluctor-wheel cast into the crank, so I turned an
>unused pulley into my reluctor and relocated the sensor to a bracket I
>fabricated by that pulley.  I welded bolt heads to the pulley in the
>appropriate pattern.
>The pattern that the DIS module needs to see in order to function is this:
>One pulse every 60 degrees PLUS a synch pulse 10 degrees After Top Dead
Center
>(7 pulses). All these pulses go through the one sensor.
>So the DIS module synchs itself that way.  It then sends a non-synched
signal
>to the ECM.  It communicates with the ECM in the same way an HEI module
would.
>All the wires have the same color code and there are the same number of
total
>wires.  I believe the plugs are even the same.  I could unplug the harness
>from my DIS module and plug it into an HEI module and all the wires would
>match up and function EXCEPT that the signal the DIS sends is inverted from
>the signal an HEI module would send.  It stays high and then goes low when
>there is a pulse instead of staying low and then going high when there is a
>pulse (like the HEI).
>
>Ted
>