Re: TPI '165 pulling timing after Cold start

[Squash <realsquash@yahoo.com>]

My 730/aujp sets a code 43 w/o the knock sensor connected.

Squash

--- Gabe <gellett@earthlink.net> wrote:
> Mine ('165) has never set a code associated with the Knock sensor being
> disconnected either.  It has, however set a code when the ESC module was missing
> - when still in the testing phase of the installation.
> 
> I found that when I ran the '870, it has a pretty limited set of codes/tests.
> 
> Gabe
> 
> Craig Marcho wrote:
> 
> > I noticed the other day that my wire to the knock sensor had come off. I
> > plugged it back in, but I don't know how long this has been going on.... I'm
> > still using the '870 ECM and had never had a code the entire time. Does the
> > '870 not do the diagnostic thing on startup?
> >
> > Craig M.
> >
> > ----- Original Message -----
> > From: "Gabe" <gellett@earthlink.net>
> > To: <gmecm@diy-efi.org>
> > Sent: Thursday, July 20, 2000 3:19 PM
> > Subject: Re: TPI '165 pulling timing after Cold start
> >
> > > I'll reconnect it after work this afternoon and get back to the list with
> > the
> > > results....
> > >
> > > Does anyone know the application for APYN???  It was on the GMECM FTP...
> > >
> > > Thanks
> > > Gabe
> > >
> > > Bruce Plecan wrote:
> > >
> > > > > Will it set a code with just the knock sensor itself disconnected?
> > > >
> > > > Generally yes.
> > > >
> > > >  I thought
> > > > > the sensor inputted a frequency into the ESC which then conditioned it
> > and
> > > > fed
> > > > > it into the ECM.  I figured the lack of those frequencies would just
> > be
> > > > > interpreted as a lack of knock.
> > > >
> > > > NO
> > > > The ecm has self testing.
> > > > I will under a given set of circumstanes add a bunch of timing for just
> > a
> > > > moment, and then listen for knock, no knock set a check engine light.
> > > >
> > > > > The ESC module and all associated wiring are intack.  My theory was
> > > > (keeping in
> > > > > mind that I could not burn new calibrations at that time):  It was
> > losing
> > > > power
> > > > > between shifts, I wanted to see if the ECM was taking away advance
> > between
> > > > > shifts, it was.  I thought the disconnected knock sensor would be just
> > > > like a
> > > > > knock free engine to the ECM.  Last night I burnt a couple new chips
> > and
> > > > tried
> > > > > them out, didn't think to reconnect the knock sensor.  Was trying to
> > > > correct
> > > > > cold start (one thing at a time).....
> > > >
> > > > Thte thing to so is get all the oem stuff working right first, and then
> > try
> > > > to tune it.
> > > > Grumpy
> > > >
> > >
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> >
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> 


=====
Trains, Trucks, and EFI at http://www.trailrunners4x4.org/users/realsquash

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