Need 3.2L Knock (KS) Sensor Wiring Info

[Austin]

I have a knock sensor from a 3.2L V6 SHO engine. It's a two wire sensor. I need a wiring diagram for it. Neither terminal is a ground connection, so I'm guessing one is power and one is signal... but I don't want to put 12 volts to a 5 volt sensor (if that's what it is).

If somebody wanted to tell me the thread pitch, that'd be nice also. One less thing I'd have to do...

Keep reading if you want a little background...

I drive a Subaru WRX, which has a 2.0 liter turbocharged motor (EJ20). The bore size on an EJ20 is 92mm/3.62", which is identical to the bore size of your 3.2L V6. Engine knock reverberates at a certain frequency (and it's harmonics), and that frequency is dictated by bore size. That's why I need a knock sensor (other than the EJ20 OEM knock sensor) designed to sense knock from a motor w/a 92mm bore size (6250Hz).

I'm fairly modified, and for engine management I've gone with an Electromotive TEC3. The TEC3 is desinged to work with a GM knock sensor, but the GM knock sensor that Electromotive sells is not ideal for sensing knock in an EJ20 (just as it would not be ideal for sensing knock in a 3.2L V6 SHO motor). The GM (and EJ20) knock sensor is a one wire sensor.

The EJ20 oem knock sensor doesn't generate enough electromotive force (output) to input to the TEC.

I've poured through the factory service manual for '94 Taurus/Sable/SHO, but I couldn't find any pinouts or wiring diagrams that gave me what I needed...

As an alternative, if anyone knows a GM motor with a 92mm bore, I'd give ya' a dollar! wink

Thanks for the info

 

[naval-avi8or]

. Wire
. Color
359 GY/O 18 AB = Sensor Signal Return (pin next to three tab outer lock)
310 Y/R 18 AB = Electronic Engine Control to Knock Sensor. (pin located next to internal orintation key)

<small>[ August 12, 2002, 11:32 PM: Message edited by: naval-avi8or ]</small>

 

[Austin]

Hmmm... Is there a way to post a pic in this forum?

Thanks for the info!

My knock sensor has no internal orientation key, but there are three outer tabs. I'm guessing the middle outer tab would be the "outer lock", so that's good enough for me.

Do you know what voltage is supplied by the ECU/ECM/computer to the knock sensor on the "310" pin?

FWIW, there are imprints in the white plastic connector, one by either pin... the 359/Sensor Signal Return pin (by the middle outer tab) has a "2" next to it, and the 310/Electronic Engine Control to Knock Sensor pin has a "D" next to it.

Does that sound right?

Thanks again

 

[Austin]

This is my sensor -