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Wiring Knock Sensors Directly To Ecu

Hibino

By Hibino,
in Engines & Forced Induction

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Hibino Community Regular

Hibino

Posted
Posted

Hey guys,

I've got a 25 neo in my R32. Got a loom spliced together as part of the engine package. All works great except when I went to get it tuned the tuner said the knock sensors weren't working. I can't remember whether we (my brother and I) used the 32 or the 34 knock sensors but I've been told they should both work.

We're guessing the wiring in the loom somewhere is cactus so is there a way to wire them directly to the ECU?

Thanks!

Simon-S14 Grand Master

Simon-S14

Posted
Posted

the knock sensor loom on rb25's is part of the alternator loom. so if you used the 32 alt loom then you'll have no knock sensors hooked up at all.

on the intake mani theres two big wite plugs.. one is for injectors and the other is for knock sensors... is it plugged into anything?

Hibino Community Regular

Hibino

Posted
  • Author
Posted

IMG_2529.jpg

IMG_2530.jpg

This? (red and white shielded wires)

I made a thread ages ago about them and no one was much help. It was hanging off my motor when I got it.

I assume this is the knock sensor wiring? Can I just hardwire the knock sensors to where this plug goes to normally?

Simon-S14 Grand Master

Simon-S14

Posted
Posted

true but the point is that in this situation i dont think its been wired in correctly.

so if he used a 32 alt loom, he's prob got no knock sensors hooked up.. if he couldnt get any then the easy way out would be to run two wires from each sensor to the relevant pins in that bottom grey plug. (rather then go all the way to the ecu)

Hibino Community Regular

Hibino

Posted
  • Author
Posted (edited)

I've got a grey plug that goes to the injectors and another big grey plug that goes to the traction control (no butterfly in it so won't do shit).

That grey plug I posted up before was attached to the same place as where you've shown along with a brown and a black plug. The grey plug I've shown plugs into a grey (with purple centre) plug.

And thanks for your help both of you :(

Edited by Hibino

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