2000 RPM knock

[Shannen Durphey]

Yup, I've had false EST signals induced by wires too close to the coil
wire.  
Shannen

Barry Tisdale wrote:
> 
> To make a *real* long story short, the false knock I was getting @ 2000
> RPMs is really that - but its coming from within the ECU.
> 
> Disconnecting the knock sensor completely results in no knock (naturally),
> but sets the ESC code.  No surprise there.
> 
> However, simulating the resistance of the KS w/ a 3.9k resistor (value of
> the KS is 3.7k), connected to the KS wire (cut at the ECU), gives the same
> strong knock @ 2000 revs.
> 
> So, its getting into the ECU or originating there.  Tomorrow's project is
> to 'scope all the I/O lines to the ECU.
> 
> Anybody had a similar experience?
> 
> No wiring changes were made at any time during the past few weeks engine work.
> 
> Thanks - Barry
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org