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Hi giys,
Ive raised this question before and really cant go further in my build till i know whats going on.

I had a faulty knock sensor, the black backing was all melted and oozing out, so i replaced it.. still got the code 31, so i checked the wiring....
The shielded cable from the ecu to knock sensor is a bit dodgy, ive groundd the shielding directly to the chasis and connected the other end of the shielding to the negative part of the knock sensor plug ( the plug on the ecu end not the sensor end) then connected the other white ish yellowish (old) wire to the other part of the plug, from ecu end....

Is that connected right?

Do i have to use shielded cable if i wish to replace the entire cable ?

Thanks for any help

Hey i just found this which suggests i did things wrong
http://clintsgarage.blogspot.com.au/201 ... ensor.html

Seems i need to try and run a seperate ground wire for the negative end, should this not be connected to the sensor ground at the ecu wiring?

Ok soooo yay i fixed it !!!!!!
What a stuff around!

After searching on the net and not getting 100 percent clear ideas on what to do i reached out to logic and try n see methods.

Heres what i did and found out...

The cable from ecu has to be shielded, this shielding has to be grounded to the chasis.
The power side of the shielded cable goes into the power side for the knock sensor,
the plug ( from ecu to knock sensor not the one from knock sensor)
holds the cables in via a small thin blue rubber seal in back of plug, this is not soldered or crimped.... so in my case i was going to re solder the wires as they were in 2 parts, instead i removed the short bit i had left on the plug by removing the rubber with a small thin screw driver then using pliers i pulled the wire from the plug, i spliced my wire from ecu put heatshrink over the shielded part so no contact with anything else,pull the blue rubber ring over the new cable, then folde
d and twisted my splice to make it thick,
then push it in the plug to make it hold in push the blue ring into the plug as far as it goes without braking it.

Then run a seperate cable from the negative end of the plug to the sensor grounding point of the ecu ( important wont work otherwise)


Thats it job done, make sure you get a good connection and it worked...


Thanks to everyone for your help