Re: Testing Knock Sensors

[Sachelle Babbar <sbabbar@iris.nyit.edu>]

my point exactly.

****************************************************************************
*Steve                                             Sachelle Babbar
*'87  5000CS Turbo 5spd 1.3-2.0 bar             <SBABBAR@IRIS.NYIT.EDU>
*Cockpit adjustable wastegate, AudiSport badge
*
*Disclaimer:"Any information contained herein is based purely on my own
*personal experience and may not necessarily reflect yours. Use caution as
*your results may vary from mine."
********************************************************************************
                                                                               



On Thu, 2 Dec 1999, Orin Eman wrote:

> Yes, but whatever signal the sensor produces is ignored below 0.7bar.
> As long as there aren't any major vacuum leaks, it isn't going
> to affect timing at idle.
> 
> > That's when the ecu turns the regulation system on. That doesn't mean that
> > the piezoelectric crystal in the sensor isn't conducting. On the contrary,
> > it still is. An o2 sensor will still function even when the system is in
> > open loop.
> 
> > ****************************************************************************
> > *Steve                                             Sachelle Babbar
> > *'87  5000CS Turbo 5spd 1.3-2.0 bar             <SBABBAR@IRIS.NYIT.EDU>
> > *Cockpit adjustable wastegate, AudiSport badge
> > *
> > *Disclaimer:"Any information contained herein is based purely on my own
> > *personal experience and may not necessarily reflect yours. Use caution as
> > *your results may vary from mine."
> > ********************************************************************************
> 
> 
> 
> 
> > On Thu, 2 Dec 1999, Orin Eman wrote:
> 
> > > > you also should be able to watch the flywheel with a timing light, as
> > > > your talented assistant taps the block (or the sensor - but with
> > > > something light like a thin screwdriver - very lightly!), you will see
> > > > the timing get retarded as the ECU "hears" the knocks you are making and
> > > > takes corrective measures.
> > > 
> > > Probably won't work.  The ECU knock code only takes effect
> > > over 0.7 bar manifold pressure.
> > > 
> > > Orin.
> > > 
> 
>