2000 RPM knock

Shannen Durphey shannen at grolen.com
Thu Apr 6 23:21:29 GMT 2000


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
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