Factory Instrument Panels

[Don.F.Broadus at ucm.com]

David, you should have the check today or tomorrow.  The instrument panel I
got to change my truck over to a tach has a
resistor on the back mounted in two clips.    Don 

> -----Original Message-----
> From:	David A. Cooley [SMTP:n5xmt at bellsouth.net]
> Sent:	Tuesday, January 12, 1999 8:35 PM
> To:	diy_efi at efi332.eng.ohio-state.edu
> Subject:	Re: Factory Instrument Panels
> 
> At 08:38 PM 1/12/99 -0500, you wrote:
> >Has anyone ever used a GM gage package in anything that they have adapted
> to
> >EFI?
> >
> >The reason I am asking is I need to adapt a tachometer module from a 90
> >Turbo Sunbird to a 91 Sunbird.  The difference is the 90 is a four
> cylinder
> >car, and the 91 is a 3.1V6.  The tach is reading about 50% higher in the
> V6
> >(which makes sense because for every 2 pulses it expects to see, it
> receives
> >three).
> >
> >If there is no simple solution, does anyone have a circuit that will
> delete
> >every third pulse from the spark module?  I don't know what voltage the
> >signal is, but it is a 3.1V6 with the distributorless 3-coil module.
> Since
> >there fairly common, i'm hoping someone knows ;)
> 
> Scott,
> Usually there is a resistor to be changed in a tach for the number of
> cyls... not sure if the dash's had a switch or jumper or socketed
> resistor,
> but I can't see them using 2 different tachs for the same year, different
> engine... I'd pull the guage cluster and check around the tach circuitry.
> ===========================================================
>            David Cooley N5XMT           Internet: N5XMT at bellsouth.net
>      Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
>        I am Pentium of Borg...division is futile...you will be
> approximated.
> ===========================================================