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Knock detection


jason bowden
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I am looking for plug and play Ecu,s to fit to 4 or 5 Subaru and Mitsubishi. A few years back i asked about knock control on the G3 plug and play. I see know you can fit a knock block for closed loop knock control. My question is can you configure the engine check light for visible knock detection warning?. I see it is connected in the wire pin out, i don't really want to have another box wired in for knock warning, i would rather map ignition 'safe' and have a visual warning of knock, in case of duff fuel etc. Also i cannot see a closed loop boost control option, I presume i cannot see it on my software because its not activated. Thanks Jason

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  • 3 weeks later...

With the newer firmware you can now have alarms flash the CE light. I've not got my CE light hooked up anymore as I wanted to use that output for the water injection. Most sensors and so forth can have alarm levels put on them, I've not delved too far and don't have windows running at the moment so can't check but assume you should be able to.

Also if you already have the knock block, why not just output from that to the digital knock display? I still run the knock link anyway as it was the first visual knock display I had in the car, its just a visual now. 

No closed loop boost control, but then I find that open loop combined with using gear based settings works perfectly for me.

Cheers

Brett

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On further investigation you may not want to do it due to the way the error detection is setup at the moment...

It is pretty basic, but for the analogue inputs, which KNOCK is one of a 0-5V input, you could work out the voltage that would indicate a value as knock and flash on that. I think some more smarts are needed to actually flash the CE based on a knock event itself...

Of course be careful as this error once breached will probably stay until the ignition is cycled, which means that you could be in perpetual knock :)

Cheers

Brett

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