GM 4cyl DIS ... what cars have 'em?

[Shannen Durphey]

Quad 4 is technically IDI, which is Integrated Direct Ignition.  Quad 4 is 2
coils/4 plugs, like DIS.  It uses a triggering scheme very close to DIS, and
doesn't require individual trigger lines for each coil like CNP.  And when referred
to in same breath as Alphas, it's also not PNP.

If DIS and CNP are "generational" designs, the quad 4 systems belong to the DIS
generation.

Shannen


ae2598 at wayne.edu wrote:
> 
> Well, if I understand my terminology, the Quad-4 is CNP, not DIS.  I think
> we got into a mini-flame-war about this here on the list about 6 months
> back :)
> 
>  On Thu, 8 Mar 2001 ECMnut at aol.com wrote:
> 
> > In a message dated 3/8/01 8:06:19 PM Eastern Standard Time, Tedscj at aol.com
> > writes:
> >
> > >
> > >  I see the 6cyl DIS on just about every other GM car in the junkyards, but
> > I
> > >  don't recall seeing any 4cyl DIS units.  But I know they exist.
> >
> > Look for Quad-4 cars.  GandAm, Cutlass Calais,  Sunfire...
> > Mike V
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