[Diy_efi] Mystery ignition component

[steve ravet]

The schematic is in the service manual.  Here's an example:

ftp://ftp.diy-efi.org/pub/gmecm/manuals/1227747/747ecm5.jpg

I doubt the ESC pinout has ever changed, but get schematics from both
vehicles and compare if you want to be sure.

--steve

Jeff Behrens wrote:
> 
> Yes.  Does anybody know where to get the schematic for
> how it hooks into the ecm?  I put a 1989 throttle body
> injection setup onto my 91 Z71 and the middle two
> wires were different between the two connectors.  I
> just want to make sure it wont be a problem.
> 
> Jeff
> --- steve ravet <sravet at arm.com> wrote:
> > Is it the ESC module?
> >
> > http://chevythunder.com/esc_module.jpg
> >
> > --steve
> >
> > Jeff Behrens wrote:
> > >
> > > I have a 1991 Gmc truck with a 5.7.  Does anybody
> > know
> > > what the approx. 3 inch by 3 inch electrical box
> > that
> > > is with the map sensor and the egr valve position
> > > sensor cluster on the intake manifold?  It has 5
> > pins
> > > coming out of it and uses four wires with a wide
> > flat
> > > connector.  I cant find it in the truck schematic
> > or
> > > any parts breakdowns.

-- 
Steve Ravet
steve.ravet at arm.com
ARM,Inc.
www.arm.com

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