Re: TPI '165 pulling timing after Cold start

[Gabe <gellett@earthlink.net>]

Will it set a code with just the knock sensor itself disconnected?  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.

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).....

Thanks
Gabe

Bruce Plecan wrote:

> Before even trying to diagnose the system you should have it close to right.
> Unless you have the flag disabled for the ESC test you need to figure out
> why it's not setting a code.
> Grumpy
>
> > Why does my '165 seem to pull about 15~20 deg of timing out after cold
> start and
> > leave it out until I am running up the road a ways?  I have tried a few
> > different stock calibrations, namely ARAP, APYP, and APYN - I believe all
> those
> > are '89 code.
> >
> > BTW, can anyone tell me the application for APYN - I have been looking for
> a
> > downloadable '89 305 auto, code to start with (I just got my EPROM eraser,
> so
> > let the games begin!)
> >
> > Anyway....  This removal of timing causes some nasty derivability problems
> when
> > cold (as well as a nasty exhaust rasp) and I can't seem to get rid of it.
> I
> > haven't figured out the exact event that is causing the timing to go back
> in
> > when it does (maybe CL?), for obvious reasons, this event is hard to
> catch.
> >
> > Right now I have the knock sensor disconnected, and the ECM is setting no
> codes
> > of any kind.
> >
> > Thanks
> > Gabe
> >
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