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Will Stock Knock Sensor Pick Up Ping At High Revs?

simpletool

By simpletool,
in Engines & Forced Induction

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simpletool Mentor

simpletool

Posted
Posted (edited)

Hi,

Lately I've heard a noise when I rev past 6000rpm that sounds a lot like knock to me. But only occurs after 6000rpm (20 degrees full load timing on ECU, 10psi). The thing is that the SAFC II never registers any increase in knock value at all at this point - it is hooked into the rear 3 cylinders sensor. The knock reading does work in the midrange. so do you think it is pinging loud enough to be audible at 90kph but not register on the knock sensor.

Alternatively it could be something metal vibrating in my engine bay.

I'm asking as it is hard to diagnose as I have reduced boost to stock and it still makes the pinging noise and base timing is set at ~ 14 BTDC. It's not like I want to have it sit and ping all the time to diagnose and I don't like any dyno operators I have found in BNE.

Edited by simpletool
femno Grand Master

femno

Posted
Posted

Does it sound like nuts and bolts rattling around inside the engine?

What petrol you using?

Find a dyno operator with a standalone knock monitoring device and dyno test, for piece of mind.

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