90 MAP system Code 43 help needed

[Programmer]

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.
----- Original Message -----
From: <mike.hoenes at ncmail.net>
To: <diy_efi at diy-efi.org>
Sent: Monday, February 12, 2001 6:07 AM
Subject: 90 MAP system Code 43 help needed


> 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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