Nord Knock sensor mounting - Page 2 - Alfa Romeo Bulletin Board & Forums
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post #16 of 18 (permalink) Old 04-10-2013, 06:40 PM Thread Starter
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Well the problem wasn't strictly a ground loop issue, let's just call it "user error" and move on, shall we?

So once the previous problem was sorted, I hooked up a LED to the knock filter output, and with the engine off I tapped various spots on the engine with a spanner but got absolutely no response.
Resisting the urge to whack it harder, I re-checked my wiring and noticed I hadn't plugged the knock sensor back in
Once that was done, sure enough the LED flashed differently depending on where (and not how hard) I tapped.

I started up the engine, and the LED went mad so I backed the knock filter settings right off until it stopped.
With the engine idling, I increased the timing by 10* and immediately the LED started flickering away. When I set it back, the LED stayed off.

I think I'll get a cleaner signal when I move the sensor away from the injector/valve, but it looks quite usable as it is now.
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post #17 of 18 (permalink) Old 04-11-2013, 12:09 AM
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Nothing stopping you from tee-ing into the knock sensor signal with a small microphone and listening to it.
Adaptronic have a headphone jack and small amplifier built into their computers now for that very reason.

Slowly Progressing Vortech Supercharged 1990 Alfa Romeo 75 Potenziata. Out of Action Twin-Charged 1988 AW11 MR2. Current Daily Driver, The Glorified Taxi 2006 BF FPV F6 Typhoon.
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post #18 of 18 (permalink) Old 04-13-2014, 08:21 PM
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Festy...where did you end up with this? Were you able to get a usable location and set-up for your knock sensor?
What knock sensor are you suing? Do you have a P/N for it and a opic where you mounted it?
Thanks,
Don
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