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Re: Testing Knock Sensors

> > > 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.

I've seen it... albeit on a 4 cyl engine, mounted sideways in the car. 
Normally aspirated.

But, I would have to say that this isn't a "test" per se - it's more of
a "fun thing to do".  Really.

Huw Powell


82 Audi Coupe; 84 4kq; 85 Coupe GT; 73 F250