Re: 200 Knock Sensors

[Brett Dikeman <brett@pdikeman.ne.mediaone.net>]

>I pull is 2144, indicating no signal from knock sensor #2.  That
>initially told me that the sensor was dead or the typical wiring grief.
>Using a DVM, I read voltage from the sensor when tapping on the block,
>so the sensor is at least not totally dead.  The connectors seem in
Use a scope, not a DVM.  The DVM won't tell you much.  The sensor is
basically a microphone.  If the ECU sees a big noise when it knows it
hasn't fired a cylinder, badabing badaboom(pardon the pun) it knows there's
knocking going on.

>excellent condition.  After checking torque, cleaning wiring connectors,
check the torque again.  Get the torque wrench calibrated.  etc. etc.

>I don't understand how the ECU uses both sensor signals, so I really
>don't understand these results.
I know that on the 200q 20v there are two sensors, one for one "half" of
the cylinders, the other for the remaining(3 cyl/2 cyl split of course.)

> I REALLY don't understand the speed correlation?  What should I expect to
>pay
>for a knock sensor?

I do.  Sounds like the sensor isn't torqued right, and at certain speeds,
the sensor picks up road vibrations and the ecu thinks it's the engine,
knocking.

I wouldn't expect the sensor to be much...$30-40 maybe?

Brett

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Brett Dikeman
brett@pdikeman.ne.mediaone.net
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