Mike you cannot see the multi-firing of the
MSD with a timing light.
You are seeing the timing change
(advance?)
from some mechanism
Joe :)
Mike D MEIERLE wrote:
> List,
> Please bear with the newbie,
> I finished installing a MSD 6AL w/Crank Trigger, New (locked
> out)Distributor, Wires & Coil on the SBC.
> Sucker started right up, Put the timing light to it and I'm seeing 2
> marks at low RPM. 1st mark is right where I want it. 2nd mark is down a
> ways on the scale. I rev it up a little and the 2nd mark goes away, then
> comes back as the RPM drops back down to idle.
> I read the documentation, It says MSD fires for 20 degrees of rotation
> up to 3000 RPM then fires only once due to time constraints. Is that why
> I'm seeing 2 marks? or do I have a arcing/induction problem at low RPM?
> (I'm hoping my first theory is correct.)
>
> --
> Michael Meierle
> Alcatel Carrier Internetworking Division
> http://www.alcatel.com/
> Newport Beach, CA.
> 949/629-3656
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