90 MAP system Code 43 help needed

[Programmer]

Yeah--I remember some guys
setting ESC codes because they were running 93 octane--but I don't
recall the code doing the "timing test" in the early years...

Lyndon.
----- Original Message -----
From: Bruce Plecan <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Monday, February 12, 2001 10:48 AM
Subject: Re: 90 MAP system Code 43 help needed


>
> Also, might need more timing added during the test.
> You can get to the stage of everything perfect and do EST codes, cause the
> engine is not very detonation prone.   In addition to items mentioned.
> Bruce
>
> From: "Programmer" <nwester at eidnet.org>
> > Bad knock sensor, RFI from ignition wiring (make sure the ignition isn't
> > within 6" of the KS wiring circuit--I can send you the actual GM
> diagnostic
> > sheet on this.
> > Lyndon.
>
> > From: mike.hoenes at ncmail.net
> > > I need a guru on this one.
> > >  My ECM is setting a code 43 - which on this setup is indicative of
> > something wrong
> > > with the Knock Sensor circuit.
> > > I have replaced the sensor, the ECM, the distributor pickup, checked
all
> > the wiring,
> > > and I have checked all the "sense" voltages in the Knock Sensor
circuit.
> > All the
> > > voltages indicate that everything is normal and that it should not set
> the
> > code.
> > > Does anyone know of another reason it sets a code 43?
> > > The system worked fine for about 6 months beofe it started setting the
> > code.
> > >
> > > TIA
> > > mike
> >
>
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