[Diy_efi] Holley projection help needed

[Ray Drouillard]

Bite the bullet and order a sensor from Holley.  Once you get it, do all the
testing you want so that you can come up with an adapter for your current
sensor (as a backup).


Ray



----- Original Message -----
From: "Jeff Behrens" <jwg94 at yahoo.com>
To: "List for general do-it-yourself EFI talk" <diy_efi at diy-efi.org>
Sent: Monday, June 02, 2003 10:41 PM
Subject: Re: [Diy_efi] Holley projection help needed


> The orange wire on mine is the supply wire that reads
> 4.8 volts with the engine off.  The signal from the
> map sensor is 4.4 in the same condition.  I made a
> voltage divider tonight and dropped the voltage down
> to 2.5 on the suppply side and the truck actually ran.
>  It really leaned things out.  The system is still
> very unstable as it keeps changing state from idle to
> decel and run.  If any body has any experience with
> projection I could really use some advice.
>
>
> Jeff
> Automation specialist
> --- Joe Lutz <joeelutz at hotmail.com> wrote:
> > It sounds like maybe you have two of the three wires
> > going to the map sensor
> > reversed or you have the wrong sensor.  Is it a one
> > bar sensor?  On the
> > sensor one wire is 0V, another should be ~4.8ish V
> > and the middle wire is
> > the wire returning the signal to the ecm.  It may be
> > at ~2v with the sensor
> > pluged in.  Possible this is what they are talking
> > about.
> >
> > Joe
> >
> >
> > >From: Jeff Behrens <jwg94 at yahoo.com>
> > >Reply-To: List for general do-it-yourself EFI talk
> > <diy_efi at diy-efi.org>
> > >To: diy_efi at diy-efi.org
> > >Subject: [Diy_efi] Holley projection help needed
> > >Date: Mon, 2 Jun 2003 07:45:36 -0700 (PDT)
> > >
> > >I purchased a holley projection 4di system and am
> > >having some issues with it.  My map sensor reading
> > >with the key on ignition off is 192 kpa, the book
> > says
> > >it should be 101.  It also states the voltage to
> > the
> > >sensor should be 2 volts with the koio.  Mine reads
> > >4.8 volts.  The other problem I am seeing is the
> > >system is constantly changing states between idle,
> > >run, and standby making the idle terrible.  Any
> > help
> > >would be appreciated.
> > >
> > >
> > >Jeff
> > >
> > >__________________________________________________
> > >Do you Yahoo!?
> > >The New Yahoo! Search - Faster. Easier. Bingo
> > >http://search.yahoo.com
> > >
> > >_______________________________________________
> > >Diy_efi mailing list
> > >Diy_efi at diy-efi.org
> > >http://www.diy-efi.org/mailman/listinfo/diy_efi
> >
> >
> _________________________________________________________________
> > Help STOP SPAM with the new MSN 8 and get 2 months
> > FREE*
> > http://join.msn.com/?page=features/junkmail
> >
> >
> > _______________________________________________
> > Diy_efi mailing list
> > Diy_efi at diy-efi.org
> > http://www.diy-efi.org/mailman/listinfo/diy_efi
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Calendar - Free online calendar with sync to Outlook(TM).
> http://calendar.yahoo.com
>
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://www.diy-efi.org/mailman/listinfo/diy_efi
>



_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi